User's Manual

12
Notes:
•
GPIOx: General purpose inputs/outputs. The pins are high impedance
inputs when initially powered, following a module reset. You can
configure all pins as inputs or outputs under software control.
•
Host TX1/RX1 and host RTS1/CTS1: Standard logic levels. No RS-232
transceiver.
•
USB_DP: If UART_SEL_L is low, pull up to wake up. If logic level is low,
IM11 is in Sleep mode.
•
All signals are 3.3 V logic levels (5 V tolerant inputs).
26
GND
Ground
27
GND
Ground
28 GPIO1
29
GND
Ground
30 GPIO3
31
Reserved
Do NOT connect
32 GPIO4
33 RESET_L Logic low level resets IM11
34
GND
Ground
35
GND
Ground
36 USB_DM USB data minus
37
GND
Ground
38 USB_DP USB data plus
39 +V_BATT
Power input
40
GND
Ground
41 +V_BATT
Power input
42 No Connect Not connected
43
GND
Ground
44 GPIO5
45 HOST_CTS1 Future use
46 GPIO6
47 HOST_RTS1 Future use
48 GPIO7
49 HOST_RX1
Output. Rx data output to host
50
GND
Ground
51 HOST_TX1
Input. Tx data input from host
52 +V_BATT
Power input