xobs/tomu-fpga
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

hardware: replace VCCPLL regulator with RC network

Browse Source 
Having a full regulator on VCCPLL causes the ESD network in the ICE40 to
freak out, dumping VCCPLL into GND and trying very hard to burn out the
regulator.

Replace it with a simple RC filter network, which is less clean but
results in a happier ESD network.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross
2018-11-25 04:08:23 +08:00
parent f3543e6e03
commit 0a7b84d1c3
3 changed files with 660 additions and 775 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
hardware/pcb/tomu-fpga-cache.lib
View File

@@ -28,7 +28,6 @@ F2 "" 0 0 50 V I C CNN
F3 "" 0 0 50 V I C CNN
$FPLIST
TO-???*
*SingleDiode
*_Diode_*
*SingleDiode*
D_*
@@ -133,6 +132,19 @@ X GND 1 0 0 0 D 50 50 1 1 W N
ENDDRAW
ENDDEF
#
# power:PWR_FLAG
#
DEF power:PWR_FLAG #FLG 0 0 N N 1 F P
F0 "#FLG" 0 75 50 H I C CNN
F1 "power:PWR_FLAG" 0 150 50 H V C CNN
F2 "" 0 0 50 H I C CNN
F3 "" 0 0 50 H I C CNN
DRAW
P 6 0 1 0 0 0 0 50 -40 75 0 100 40 75 0 50 N
X pwr 1 0 0 0 U 50 50 0 0 w
ENDDRAW
ENDDEF
#
# tomu-fpga:Case
#
DEF tomu-fpga:Case XX 0 40 Y Y 1 F N

991
hardware/pcb/tomu-fpga.kicad_pcb
View File

File diff suppressed because it is too large Load Diff

430
hardware/pcb/tomu-fpga.sch
View File

@@ -542,17 +542,6 @@ $EndComp
Wire Wire Line
10850 5200 10850 5400
$Comp
L power:+1V2 #PWR032
U 1 1 5BE5ABB7
P 8750 5050
F 0 "#PWR032" H 8750 4900 50 0001 C CNN
F 1 "+1V2" H 8765 5223 50 0000 C CNN
F 2 "" H 8750 5050 50 0001 C CNN
F 3 "" H 8750 5050 50 0001 C CNN
1 8750 5050
1 0 0 -1
$EndComp
$Comp
L power:+2V5 #PWR037
U 1 1 5BE5AC1B
P 9300 5450
@@ -563,8 +552,6 @@ F 3 "" H 9300 5450 50 0001 C CNN
1 9300 5450
1 0 0 -1
$EndComp
Wire Wire Line
8750 5200 8750 5050
Wire Wire Line
8850 1100 8850 1300
Wire Notes Line
@@ -729,34 +716,6 @@ F 9 "C" H 0 0 50 0001 C CNN "Spice_Primitive"
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR031
U 1 1 5C5B4C14
P 8600 5700
F 0 "#PWR031" H 8600 5450 50 0001 C CNN
F 1 "GND" H 8605 5527 50 0000 C CNN
F 2 "" H 8600 5700 50 0001 C CNN
F 3 "" H 8600 5700 50 0001 C CNN
1 8600 5700
1 0 0 -1
$EndComp
$Comp
L Device:C_Small C20
U 1 1 5C5E5A07
P 8850 5400
F 0 "C20" H 8950 5400 50 0000 L CNN
F 1 "0201, 100nF, 10V, X5R, 20%" H 7950 5300 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 8850 5400 50 0001 C CNN
F 3 "" H 8850 5400 50 0001 C CNN
F 4 "ANY" H 200 100 50 0001 C CNN "MPN"
F 5 "ANY" H 200 100 50 0001 C CNN "MYPN"
F 6 "ANY" H 200 100 50 0001 C CNN "Manufacturer"
F 7 "100n" H 0 0 50 0001 C CNN "Spice_Model"
F 8 "Y" H 0 0 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 0 0 50 0001 C CNN "Spice_Primitive"
1 8850 5400
1 0 0 -1
$EndComp
$Comp
L power:GND #PWR038
U 1 1 5C5F2015
P 9500 6150
@@ -767,40 +726,6 @@ F 3 "" H 9500 6150 50 0001 C CNN
1 9500 6150
1 0 0 -1
$EndComp
Wire Wire Line
8750 5200 8850 5200
$Comp
L Device:C_Small C17
U 1 1 5C64A110
P 7950 5300
F 0 "C17" H 8050 5300 50 0000 L CNN
F 1 "0201, 1uF, 10V, X5R, 20%" H 7350 5200 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 7950 5300 50 0001 C CNN
F 3 "" H 7950 5300 50 0001 C CNN
F 4 "ANY" H 150 200 50 0001 C CNN "MPN"
F 5 "ANY" H 150 200 50 0001 C CNN "MYPN"
F 6 "ANY" H 150 200 50 0001 C CNN "Manufacturer"
F 7 "1u" H 0 100 50 0001 C CNN "Spice_Model"
F 8 "Y" H 0 100 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 0 100 50 0001 C CNN "Spice_Primitive"
1 7950 5300
1 0 0 -1
$EndComp
Wire Wire Line
8850 5300 8850 5200
Connection ~ 8850 5200
Connection ~ 8750 5200
Wire Wire Line
8350 5200 8350 5100
Wire Wire Line
8850 5500 8850 5600
Wire Wire Line
8850 5600 8600 5600
Connection ~ 8600 5600
Wire Wire Line
8600 5600 8600 5700
Wire Wire Line
7950 5600 7950 5400
$Comp
L power:+3V3 #PWR040
U 1 1 5C7EE938
@@ -917,96 +842,65 @@ F 3 "" H 1500 5250 50 0001 C CNN
1 0 0 -1
$EndComp
$Comp
L Device:C_Small C19
L Device:C_Small C22
U 1 1 5BDC7C63
P 8600 4700
F 0 "C19" H 8700 4750 50 0000 L CNN
F 1 "0201, 1uF, 10V, X5R, 20%" H 8700 4850 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 8600 4700 50 0001 C CNN
F 3 "" H 8600 4700 50 0001 C CNN
F 4 "ANY" H 6100 2150 50 0001 C CNN "MPN"
F 5 "ANY" H 6100 2150 50 0001 C CNN "MYPN"
F 6 "ANY" H 6100 2150 50 0001 C CNN "Manufacturer"
F 7 "1u" H 50 100 50 0001 C CNN "Spice_Model"
F 8 "Y" H 50 100 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 50 100 50 0001 C CNN "Spice_Primitive"
1 8600 4700
1 0 0 -1
P 10050 4750
F 0 "C22" V 10150 4800 50 0000 L CNN
F 1 "0402, 10uF, 6.3V, X5R, 20%" V 9950 4200 50 0000 L CNN
F 2 "tomu-fpga:C_0402_1005Metric" H 10050 4750 50 0001 C CNN
F 3 "" H 10050 4750 50 0001 C CNN
F 4 "ANY" H 7550 2200 50 0001 C CNN "MPN"
F 5 "ANY" H 7550 2200 50 0001 C CNN "MYPN"
F 6 "ANY" H 7550 2200 50 0001 C CNN "Manufacturer"
F 7 "1u" H 1500 150 50 0001 C CNN "Spice_Model"
F 8 "Y" H 1500 150 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 1500 150 50 0001 C CNN "Spice_Primitive"
1 10050 4750
0 1 1 0
$EndComp
$Comp
L Device:C_Small C16
L Device:C_Small C23
U 1 1 5BDC7CFF
P 7550 4750
F 0 "C16" H 7600 4850 50 0000 L CNN
F 1 "0201, 1uF, 10V, X5R, 20%" V 7400 4350 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 7550 4750 50 0001 C CNN
F 3 "" H 7550 4750 50 0001 C CNN
F 4 "ANY" H 7550 4750 50 0001 C CNN "MPN"
F 5 "ANY" H 7550 4750 50 0001 C CNN "Manufacturer"
F 6 "ANY" H 6650 2150 50 0001 C CNN "MYPN"
F 7 "1u" H 0 0 50 0001 C CNN "Spice_Model"
F 8 "Y" H 0 0 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 0 0 50 0001 C CNN "Spice_Primitive"
1 7550 4750
1 0 0 -1
$EndComp
$Comp
L power:+5V #PWR028
U 1 1 5BDC817E
P 7550 4350
F 0 "#PWR028" H 7550 4200 50 0001 C CNN
F 1 "+5V" H 7565 4523 50 0000 C CNN
F 2 "" H 7550 4350 50 0001 C CNN
F 3 "" H 7550 4350 50 0001 C CNN
1 7550 4350
1 0 0 -1
P 10050 4300
F 0 "C23" V 10100 4400 50 0000 L CNN
F 1 "0201, 100nF, 10V, X5R, 20%" V 9950 3800 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 10050 4300 50 0001 C CNN
F 3 "" H 10050 4300 50 0001 C CNN
F 4 "ANY" H 10050 4300 50 0001 C CNN "MPN"
F 5 "ANY" H 10050 4300 50 0001 C CNN "Manufacturer"
F 6 "ANY" H 9150 1700 50 0001 C CNN "MYPN"
F 7 "1u" H 2500 -450 50 0001 C CNN "Spice_Model"
F 8 "Y" H 2500 -450 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 2500 -450 50 0001 C CNN "Spice_Primitive"
1 10050 4300
0 1 1 0
$EndComp
$Comp
L power:GND #PWR029
U 1 1 5BDC8269
P 7550 5150
F 0 "#PWR029" H 7550 4900 50 0001 C CNN
F 1 "GND" H 7555 4977 50 0000 C CNN
F 2 "" H 7550 5150 50 0001 C CNN
F 3 "" H 7550 5150 50 0001 C CNN
1 7550 5150
P 10800 4800
F 0 "#PWR029" H 10800 4550 50 0001 C CNN
F 1 "GND" H 10805 4627 50 0000 C CNN
F 2 "" H 10800 4800 50 0001 C CNN
F 3 "" H 10800 4800 50 0001 C CNN
1 10800 4800
1 0 0 -1
$EndComp
Wire Wire Line
7550 4350 7550 4500
Wire Wire Line
7550 4850 7550 5000
Wire Wire Line
8400 4500 8600 4500
Connection ~ 8600 4500
Wire Wire Line
8600 4500 9000 4500
Wire Wire Line
7800 4500 7750 4500
Connection ~ 7550 4500
Wire Wire Line
7550 4500 7550 4650
Wire Wire Line
8600 5000 8450 5000
Connection ~ 7550 5000
Connection ~ 8450 5000
Wire Wire Line
8450 5000 7550 5000
$Comp
L Device:C_Small C25
U 1 1 5BECED7C
P 10000 5800
F 0 "C25" H 10100 5800 50 0000 L CNN
F 1 "0201, 1uF, 10V, X5R, 20%" H 9300 5700 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 10000 5800 50 0001 C CNN
F 3 "" H 10000 5800 50 0001 C CNN
F 4 "ANY" H 2200 700 50 0001 C CNN "MPN"
F 5 "ANY" H 2200 700 50 0001 C CNN "MYPN"
F 6 "ANY" H 2200 700 50 0001 C CNN "Manufacturer"
F 7 "1u" H 0 0 50 0001 C CNN "Spice_Model"
F 8 "Y" H 0 0 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 0 0 50 0001 C CNN "Spice_Primitive"
1 10000 5800
P 10300 5800
F 0 "C25" H 10400 5800 50 0000 L CNN
F 1 "0201, 1uF, 10V, X5R, 20%" H 9650 5700 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 10300 5800 50 0001 C CNN
F 3 "" H 10300 5800 50 0001 C CNN
F 4 "ANY" H 2500 700 50 0001 C CNN "MPN"
F 5 "ANY" H 2500 700 50 0001 C CNN "MYPN"
F 6 "ANY" H 2500 700 50 0001 C CNN "Manufacturer"
F 7 "1u" H 300 0 50 0001 C CNN "Spice_Model"
F 8 "Y" H 300 0 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 300 0 50 0001 C CNN "Spice_Primitive"
1 10300 5800
1 0 0 -1
$EndComp
Wire Wire Line
@@ -1016,24 +910,12 @@ Wire Wire Line
Connection ~ 9500 5450
Wire Wire Line
9500 5450 9500 5550
Wire Wire Line
9500 5550 9600 5550
Wire Wire Line
9600 5550 9600 5650
Wire Wire Line
9600 5650 10000 5650
Wire Wire Line
10000 5650 10000 5700
Connection ~ 9500 5550
Wire Wire Line
9500 5550 9500 5600
Connection ~ 9500 6100
Wire Wire Line
9500 6100 9500 6150
Wire Wire Line
10000 5900 10000 6100
Wire Wire Line
10000 6100 9500 6100
$Comp
L tomu-fpga:Oscillator U7
U 1 1 5C0E8D0F
@@ -1223,7 +1105,7 @@ Wire Wire Line
9000 2400 9000 1900
Wire Wire Line
3500 7250 2400 7250
Text Label 9250 5000 0 50 ~ 0
Text Label 9300 5000 0 50 ~ 0
VCCPLL
Wire Wire Line
9500 5200 9600 5200
@@ -1272,10 +1154,6 @@ Wire Wire Line
9650 1900 9650 2200
Text Notes 1150 7400 0 50 ~ 0
To program SPI flash, put FPGA in RESET\nTo program FPGA, keep SPI_IO3 LOW
Wire Wire Line
9000 4500 9000 5000
Wire Wire Line
9000 5000 9600 5000
$Comp
L tomu-fpga:LDO-X2SON U1
U 1 1 5BF1A34B
@@ -1350,22 +1228,6 @@ Connection ~ 2050 3450
Wire Wire Line
2050 3450 2050 3600
$Comp
L tomu-fpga:LDO-X2SON U6
U 1 1 5BFF652A
P 8100 4800
F 0 "U6" H 7950 4750 50 0000 C CNN
F 1 "LDO-X2SON-1.2V" H 8050 4650 50 0000 C CNN
F 2 "tomu-fpga:Texas_X2SON-4_1x1mm_P0.65mm" H 8100 4800 50 0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lp5907.pdf" H 8100 4800 50 0001 C CNN
F 4 "MIC5504-1.2YMT" H 6450 3500 50 0001 C CNN "AMPN"
F 5 "Microchip" H 6450 3500 50 0001 C CNN "AManufacturer"
F 6 "576-4305-1-ND" H 6450 3500 50 0001 C CNN "APN"
F 7 "LP5907SNX-1.2/NOPB" H 6450 3500 50 0001 C CNN "MPN"
F 8 "TI" H 6450 3500 50 0001 C CNN "Manufacturer"
1 8100 4800
1 0 0 -1
$EndComp
$Comp
L tomu-fpga:Testpoint TP2
U 1 1 5C03018F
P 5250 4500
@@ -1752,10 +1614,6 @@ Text Label 8800 1800 0 50 ~ 0
USB_N
Wire Wire Line
10250 1450 10450 1450
Wire Wire Line
8350 5200 8750 5200
Wire Wire Line
7950 5600 8600 5600
Wire Wire Line
1200 4600 1700 4600
Wire Wire Line
@@ -1954,38 +1812,6 @@ Wire Wire Line
Wire Wire Line
9100 1300 9150 1300
Connection ~ 9150 1300
Wire Wire Line
8400 4650 8450 4650
Wire Wire Line
8450 4650 8450 4750
Wire Wire Line
8400 4750 8450 4750
Connection ~ 8450 4750
Wire Wire Line
8450 4750 8450 5000
Wire Wire Line
7800 4750 7750 4750
Wire Wire Line
7750 4750 7750 4500
Connection ~ 7750 4500
Wire Wire Line
7750 4500 7550 4500
Wire Wire Line
8600 4800 8600 5000
Wire Wire Line
8600 4600 8600 4500
Wire Wire Line
8350 5100 7950 5100
Wire Wire Line
7950 5100 7950 5200
Wire Wire Line
7550 5150 7550 5000
Wire Wire Line
8850 5200 9000 5200
Wire Wire Line
9000 5200 9000 5100
Wire Wire Line
9000 5100 9600 5100
Wire Wire Line
6450 950 6450 1250
Wire Wire Line
@@ -1999,4 +1825,166 @@ Connection ~ 10450 1150
Wire Wire Line
10450 1150 10650 1150
NoConn ~ 1750 5850
$Comp
L power:+1V2 #PWR0103
U 1 1 5BFB12D2
P 8250 4400
F 0 "#PWR0103" H 8250 4250 50 0001 C CNN
F 1 "+1V2" H 8265 4573 50 0000 C CNN
F 2 "" H 8250 4400 50 0001 C CNN
F 3 "" H 8250 4400 50 0001 C CNN
1 8250 4400
1 0 0 -1
$EndComp
$Comp
L Device:R_Small R10
U 1 1 5BFB144B
P 8800 4750
F 0 "R10" V 8800 4750 50 0000 C CNN
F 1 "0201, 100ohm, 1/16W, 1%" V 8900 4700 50 0000 C CNN
F 2 "tomu-fpga:R_0201_0603Metric" H 8800 4750 50 0001 C CNN
F 3 "" H 8800 4750 50 0001 C CNN
F 4 "ANY" H 300 2550 50 0001 C CNN "MPN"
F 5 "ANY" H 300 2550 50 0001 C CNN "MYPN"
F 6 "ANY" H 300 2550 50 0001 C CNN "Manufacturer"
F 7 "R" H 8800 4750 50 0001 C CNN "Spice_Primitive"
F 8 "1.5k" H 8800 4750 50 0001 C CNN "Spice_Model"
F 9 "Y" H 8800 4750 50 0001 C CNN "Spice_Netlist_Enabled"
1 8800 4750
0 -1 -1 0
$EndComp
Wire Wire Line
9950 4300 9400 4300
Wire Wire Line
9400 4300 9400 4500
Wire Wire Line
9200 5000 9600 5000
Wire Wire Line
9400 4750 9950 4750
Connection ~ 9400 4750
Wire Wire Line
9200 5000 9200 4750
Wire Wire Line
9200 4750 9400 4750
Wire Wire Line
8900 4750 9200 4750
Connection ~ 9200 4750
Wire Wire Line
8700 4750 8250 4750
Wire Wire Line
8250 4400 8250 4750
Wire Wire Line
10150 4300 10800 4300
Wire Wire Line
10800 4300 10800 4750
Wire Wire Line
10150 4750 10800 4750
Wire Wire Line
10800 4750 10800 4800
Connection ~ 10800 4750
$Comp
L Device:C_Small C20
U 1 1 5C5E5A07
P 8850 5400
F 0 "C20" H 8950 5400 50 0000 L CNN
F 1 "0201, 100nF, 10V, X5R, 20%" H 8150 5300 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 8850 5400 50 0001 C CNN
F 3 "" H 8850 5400 50 0001 C CNN
F 4 "ANY" H 200 100 50 0001 C CNN "MPN"
F 5 "ANY" H 200 100 50 0001 C CNN "MYPN"
F 6 "ANY" H 200 100 50 0001 C CNN "Manufacturer"
F 7 "100n" H 0 0 50 0001 C CNN "Spice_Model"
F 8 "Y" H 0 0 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 0 0 50 0001 C CNN "Spice_Primitive"
1 8850 5400
1 0 0 -1
$EndComp
Wire Wire Line
8850 5500 8850 5600
Wire Wire Line
8850 5600 8600 5600
Wire Wire Line
8600 5600 8600 5700
$Comp
L power:GND #PWR031
U 1 1 5C5B4C14
P 8600 5700
F 0 "#PWR031" H 8600 5450 50 0001 C CNN
F 1 "GND" H 8605 5527 50 0000 C CNN
F 2 "" H 8600 5700 50 0001 C CNN
F 3 "" H 8600 5700 50 0001 C CNN
1 8600 5700
1 0 0 -1
$EndComp
Connection ~ 8600 5600
Wire Wire Line
7950 5600 8600 5600
Wire Wire Line
7950 5600 7950 5400
$Comp
L Device:C_Small C17
U 1 1 5C64A110
P 7950 5300
F 0 "C17" H 8050 5300 50 0000 L CNN
F 1 "0201, 1uF, 10V, X5R, 20%" H 7350 5200 50 0000 L CNN
F 2 "tomu-fpga:C_0201_0603Metric" H 7950 5300 50 0001 C CNN
F 3 "" H 7950 5300 50 0001 C CNN
F 4 "ANY" H 150 200 50 0001 C CNN "MPN"
F 5 "ANY" H 150 200 50 0001 C CNN "MYPN"
F 6 "ANY" H 150 200 50 0001 C CNN "Manufacturer"
F 7 "1u" H 0 100 50 0001 C CNN "Spice_Model"
F 8 "Y" H 0 100 50 0001 C CNN "Spice_Netlist_Enabled"
F 9 "C" H 0 100 50 0001 C CNN "Spice_Primitive"
1 7950 5300
1 0 0 -1
$EndComp
Wire Wire Line
7950 5100 7950 5200
$Comp
L power:+1V2 #PWR0104
U 1 1 5C1102B3
P 8350 5000
F 0 "#PWR0104" H 8350 4850 50 0001 C CNN
F 1 "+1V2" H 8365 5173 50 0000 C CNN
F 2 "" H 8350 5000 50 0001 C CNN
F 3 "" H 8350 5000 50 0001 C CNN
1 8350 5000
1 0 0 -1
$EndComp
Connection ~ 8850 5100
Wire Wire Line
8850 5100 8850 5300
Wire Wire Line
8850 5100 9600 5100
Wire Wire Line
7950 5100 8350 5100
Wire Wire Line
8350 5000 8350 5100
Connection ~ 8350 5100
Wire Wire Line
8350 5100 8850 5100
Text Notes 9700 4450 0 50 ~ 0
VCCPLL Filter Network
Wire Wire Line
10300 5550 10300 5700
Wire Wire Line
9500 5550 10300 5550
Wire Wire Line
10300 5900 10300 6100
Wire Wire Line
9500 6100 10300 6100
$Comp
L power:PWR_FLAG #FLG0101
U 1 1 5C20D4AA
P 9400 4500
F 0 "#FLG0101" H 9400 4575 50 0001 C CNN
F 1 "PWR_FLAG" V 9400 4628 50 0000 L CNN
F 2 "" H 9400 4500 50 0001 C CNN
F 3 "~" H 9400 4500 50 0001 C CNN
1 9400 4500
0 -1 -1 0
$EndComp
Connection ~ 9400 4500
Wire Wire Line
9400 4500 9400 4750
$EndSCHEMATC