User manual

17 PCM-3343 User Manual
Chapter 2 H/W Installation
2.17 JTAG Connector (CN17)
PCM-3343 provides one 6-pin JTAG connector for initial BIOS flash use through spe-
cific BIOS flash tool. It's only reserved for debugging.
2.18 PWR / HDD LED Connector (CN18)
POWER LED (Pin1 & Pin2)
POWER LED indicator lights up when the power is on.
HDD LED (Pin3 & Pin4)
The HDD LED indicator for hard disk access is an active low signal.
2.19 I2C Bus connector (CN20)
PCM-3343 provides I2C Bus connection to I2C protocol embedded devices. Advan-
tech also provides I2C API allowing a developer to interface with an embedded sys-
tem environment and transfer serial messages using the I2C protocols, allowing
multiple simultaneous device control. Note that I2C clock and data signals are 3.3 V
voltage level.
2.20 CompactFlash (CN23)
The board provides a CompactFlash card type I socket and type II for optional kit.
The CompactFlash card can be enabled/disabled via the BIOS settings. The default
setting is Master.
2.21 Watchdog timer configuration
An onboard watchdog timer reduces the chance of disruptions which EMP (electro-
magnetic pulse) interference can cause. This is an invaluable protective device for
standalone or unmanned applications.
CN17 JTAG Connector
Part Number 1653006101
Footprint PH_6x1V_2.00mm
Description PIN HEADER 6*1P 180D(M) 2.0mm DIP W/O Pb
Pin Pin Name Signal Type Signal Level
1+5V PWR
2 GND GND
3TCK In +3.3V
4 TDO Out +3.3V
5TDI In +3.3V
6 TMS In +3.3V