Eddy DK Programmer Guide
111
6.7
GPIO Functions
GPIO functions control up to 56 GPIO ports provided by Eddy-CPU, 34 GPIO ports provided by Eddy-S4M
They can spot 3.3V power or control writes with individual GPIO port.
Pins provided by Eddy CPU/S4M are public pins that can be used to control other devices and are not used solely
for GPIO.
Eddy CPU/S4M provides 32 signal lines as 3 port groups; Port A, B, C.
Each port in Port A, B, C can be configured to be used as device or GPIO. They can be configured in Web.
Please refer to sample source ‘
testdk.c
’ in Eddy_Apps directory for precise usage.
Eddy-CPU GPIO Table
The Yellow parts can all be used as GPIO ports if they are not used as devices.
Section
Description
Number of Ports
S0 ~ S3
Serial Port 1 ~ 4
20
Debug
Debug Port
2
Reset
Reset
1
Rdy
Ready LED
1
ADC
Analog Digital Converter
4
LAN
LAN Port
2
EEPROM
SPI (EEPROM)
4
NAND
NAND Flash
2
KEY
Key Pad
8
*
GPIO & User Peripheral
12
