EM357 pin mappings
The following table shows how the EM357 pins are used on the device.
Note Some lines may not go to the external device pins in the programmable secondary processor version.
|
EM357 pin# |
EM357 pin name |
XBee (SMT) pad# |
XBee(TH) pin # |
Other usage |
|---|---|---|---|---|
|
12 |
RST |
6 |
5 |
Programming |
|
18 |
PA7 |
8 |
7 |
|
|
19 |
PB3 |
29 |
16 |
Used for UART |
|
20 |
PB4 |
25 |
12 |
Used for UART |
|
21 |
PA0/ SC2MOSI |
16 |
11 |
Used for SPI |
|
22 |
PA SC2MISO |
17 |
4 |
Used for SPI |
|
24 |
PA2/SC2SCLK |
14 |
18 |
Used for SPI |
|
25 |
PA3/SC2SSEL |
15 |
17 |
Used for SPI |
|
26 |
PA4/PTI_EN |
32 |
19 |
OTA packet tracing |
|
27 |
PA5/PTI_DATA/BOOTMODE |
12 |
NA |
OTA packet tracing, force embedded serial bootloader, and SPI attention line |
|
29 |
PA6 |
7 |
6 |
|
|
30 |
PB1/SC1TXD |
3 |
2 |
Used for UART |
|
31 |
PB2/SC1RXD |
4 |
3 |
Used for UART |
|
33 |
PC2/JTDO/SWO |
26 |
13 |
JTAG (see Writing custom firmware) |
|
34 |
PC3/JTDI |
28 |
15 |
JTAG (see Writing custom firmware) |
|
35 |
PC4/JTMS/SWDIO |
5 |
4 |
JTAG (see Writing custom firmware) |
|
36 |
PB0 |
10 |
9 |
|
|
38 |
PC1/ADC3 |
30 |
17 |
|
|
41 |
PB7/ADC2 |
31 |
18 |
|
|
42 |
PB6/ADC1 |
33 |
20 |
|
|
43 |
PB5/ADC0 |
|
|
Temperature sensor on PRO version |
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