Manual

KTD-S0051-D Page 32 Digital I/O Interface
KTAM3874/pITX User's Guide
14.3 Connector 1
Some digital I/O signals are available through the connector J2104 (20 pins).
Header Pin Signal Description Type
1
VCC3
1)
Power +3.3V PWR
2
VCC3
1)
Power +3.3V PWR
3 SDA I
2
C
TM
3rd controller data (I2C2) IO-33
4 SCL I
2
C
TM
3rd controller clock (I2C2) IO-33
5 GPIO21 I/O GP1[27] or TIM4 IO IO-33
6 GPIO22 I/O GP1[28] or TIM5 IO IO-33
7 GPIO23 I/O GP1[29] or TIM6 IO IO-33
8 GPIO24 I/O GP1[30] or TIM7 IO IO-33
9 GPIO19 I/O GP1[11] IO-33
10 GPIO20 I/O GP1[12] IO-33
11 GPIO27 I/O GP2[07] IO-33
12 GPIO28 I/O GP2[08] IO-33
13 GPIO29 I/O GP2[09] IO-33
14 GPIO30 I/O GP2[10] IO-33
15 GPIO31 I/O GP2[11] IO-33
16 GPIO32 I/O GP2[12] IO-33
17 RSVD Reserved ---
18 GPIO25 I/O GP2[00] IO-33
19 GND Ground PWR
1
20 GND Ground PWR
CAUTION!
Do not use signal voltages above 3.3V. All I/O signals are unprotected against overvoltage.
Note: 1) To protect the external power lines of peripheral devices make sure that
- the wires have the right diameter to withstand the maximum available current.
- to enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.