[Arm-netbook] Testing: GPIO
richard.wilbur at gmail.com
Thu Jan 18 22:11:47 GMT 2018
After looking at the schematics for the DS113 v2.7 2017-02-17 and the
microdesktop v1.7 I feel the need to ask whether there are more
up-to-date schematics available?
Results of my sleuthing thus far attached.
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GPIO (General Purpose Input / Output)
DS113 Schematic v2.7 2017-02-17 page 3, lists PA(18) with PA7-PA16 used as GPIO.
Datasheet page 13, lists these all as Type = I/O, Reset State = Z, Default Pull Up/Down = NO PULL, Buffer Strength (mA) = 20
PA7 ETXD0 E8
PA8 ERXCK D9
PA9 ERXERR E9
PA10 ERXDV D10
PA11 EMDC E10
PA12 EMDIO D11
PA13 ETXEN E11
PA14 ETXCK D12
PA15 ECRS E12
PA16 ECOL D13
DS113 Schematic page 6, shows the U1-C pins for PA7-PA16 connected to the signals ethernet signals listed above.
But DS113 Schematic page 13, which shows the 68-pin connector CON15, doesn’t mention any of these signals and has at least 8 pins named “NC”?
The microdesktop housing board schematic v1.7 page 1 shows the 68-pin connector as J14 with pins labelled as
PIN# Name Connected Net
16 GPIO_0 SD0-D3
50 GPIO_1 SD0-D2
17 GPIO_2 VESA_SDA
51 GPIO_3 GPIO_3
18 GPIO_4 SD0-CMD
52 GPIO_5 SD0-CLK
19 GPIO_6 SD0-D0
53 GPIO_7 SD0-D1
22 GPIO_12 VESA_SCL
I haven’t yet found an equivalence mapping between the pinouts of the two 68-pin connectors of the two schematics.
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