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schematics: additional comments for wifi bootstrapping and readme update

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pull/3/head
davor 7 years ago
parent 36a7cfdae4
commit 3a87d41201
6 changed files with 14 additions and 3 deletions
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3
README.md
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@ -126,3 +126,6 @@ Make the prototype.
[x] 25MHz oscillator: needs clearance from LEDs, move under USB1
[ ] connect SPI Flash Quad Mode (QSPI)
[x] connect SHUTDOWN to FPGA
[ ] ESP-32: GPIO12 at boot selects internal flash voltage,
it is connected to J1_27+ and wrong pullup/pulldown at boot
will prevent ESP32 from booting

2
power.bak
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@ -1951,4 +1951,6 @@ F 3 "" H 10900 2750 50 0001 C CNN
$EndComp
Text Notes 5100 5300 0 60 ~ 0
Switching regulators 2A SOT23-5\nTexas instruments TLV62569DBV (2A)\nMicrosemi LX7172 (1.2A)\nDioo microcircuits DIO6015 (1.5A)\nDiodes AP3429/A (2A) - will it meet spec?
Text Notes 1000 5400 0 60 ~ 0
SHUTDOWN connected to\nBANK2 on "ram" sheet
$EndSCHEMATC

2
power.sch
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@ -1951,4 +1951,6 @@ F 3 "" H 10900 2750 50 0001 C CNN
$EndComp
Text Notes 5100 5300 0 60 ~ 0
Switching regulators 2A SOT23-5\nTexas instruments TLV62569DBV (2A)\nMicrosemi LX7172 (1.2A)\nDioo microcircuits DIO6015 (1.5A)\nDiodes AP3429/A (2A) - will it meet spec?
Text Notes 1000 5400 0 60 ~ 0
SHUTDOWN connected to\nBANK2 on "ram" sheet
$EndSCHEMATC

2
ram.bak
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@ -412,6 +412,6 @@ F 4 "www.mouser.com" H 9300 5250 60 0001 C CNN "Distributor1_URL"
4 9300 5250
1 0 0 -1
$EndComp
Text GLabel 10050 4850 2 60 Input ~ 0
Text GLabel 8550 3450 0 60 Input ~ 0
SHUTDOWN
$EndSCHEMATC

4
wifi.bak
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@ -225,7 +225,7 @@ Strapping pins\n(avoid using to avoid\nboot problems)\nGPIO0,2,4,5,12,15
NoConn ~ 7750 5350
NoConn ~ 7750 5050
Text Notes 2950 6700 0 60 ~ 0
ESP32 ADC capable pins\nGPIO36,39,34,35,32,33,25,26,27,\nGPIO14,12,13,15 - shared with HSPI/JTAG\nConnected to "gpio" sheet
ESP32 ADC capable pins\nGPIO36,39,34,35,32,33,25,26,27,\nGPIO14,12,13,15 - shared with HSPI/JTAG\nConnected to BANK7 on "gpio" sheet
Text Notes 3850 7350 0 60 ~ 0
ESP32 HSPI pins\nGPIO12: MISO\nGPIO13: MOSI\nGPIO14: SCK\nGPIO15: SS
Text Notes 4750 7650 0 60 ~ 0
@ -308,4 +308,6 @@ Wire Wire Line
Text Label 5550 4300 0 60 ~ 0
WIFIEN
Connection ~ 4750 4300
Text Notes 1800 5450 0 60 ~ 0
GPIO12 probably should be held low at reset or disconnected\nother option is to burn flash voltage efuse to 3.3V\nfor GPIO2 and GPIO12 bootstrapping considerations, read\nhttps://github.com/espressif/esp-idf/tree/master/examples/storage/sd_card
$EndSCHEMATC

4
wifi.sch
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@ -225,7 +225,7 @@ Strapping pins\n(avoid using to avoid\nboot problems)\nGPIO0,2,4,5,12,15
NoConn ~ 7750 5350
NoConn ~ 7750 5050
Text Notes 2950 6700 0 60 ~ 0
ESP32 ADC capable pins\nGPIO36,39,34,35,32,33,25,26,27,\nGPIO14,12,13,15 - shared with HSPI/JTAG\nConnected to "gpio" sheet
ESP32 ADC capable pins\nGPIO36,39,34,35,32,33,25,26,27,\nGPIO14,12,13,15 - shared with HSPI/JTAG\nConnected to BANK7 on "gpio" sheet
Text Notes 3850 7350 0 60 ~ 0
ESP32 HSPI pins\nGPIO12: MISO\nGPIO13: MOSI\nGPIO14: SCK\nGPIO15: SS
Text Notes 4750 7650 0 60 ~ 0
@ -308,4 +308,6 @@ Wire Wire Line
Text Label 5550 4300 0 60 ~ 0
WIFIEN
Connection ~ 4750 4300
Text Notes 1800 5450 0 60 ~ 0
GPIO12 probably should be held low at reset or disconnected\nother option is to burn flash voltage efuse for 3.3V operation\nfor GPIO2 and GPIO12 bootstrapping considerations, read\nhttps://github.com/espressif/esp-idf/tree/master/examples/storage/sd_card
$EndSCHEMATC

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