User's Manual

GPIO
34  Digi Connect Wi-EM 9210 Hardware Reference
GPIO Registers
Six registers govern the 16 GPIO pins. There are four configuration registers. Each has
eight bits dedicated to the configuration of each GPIO.
.
Each GPIO configuration section is set up the same way. The following table shows the
settings using bits D07:00; the same settings apply to the corresponding bits in D31:24,
D23:D16, and D15:08.
GPIO pin configuration registers
Register D31:24 D23:D1
6
D15:08 D07:00
A090 2000, config 0 GPIO [15] GPIO [14] GPIO [13] GPIO [12]
A090 2004, config 1 GPIO [11] GPIO [10] GPIO [9] GPIO [8]
A090 2008, config 2 GPIO [7] GPIO [6] GPIO [5] GPIO [4]
A090 200C, config 3 GPIO [3] GPIO [2] GPIO [1] GPIO [0]
GPIO Configuration
Setings using bits D07:00
D07:06 Reserved N/A
D05:03 FUNC
Use these bits to select the function you want to use. For
a detailed description of each function see the NS 9210
HRM in the Pinout chapter under "General purpose I/O
(GPIO)" and the "GPIO pin use" table in this manual.
000 Function #0
001 Function #1
010 Function #2RESET_DONE - default for GPIO[12]
011 Function #3GPIO - default, except for GPIO[12]
100 Function #4