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CX-MB-EVA2 User's Manual Hardware
42
Pin Signal name Function
1 VCC Power Supply
2 SDO_TDO Serial Data Out
3 SDI_TDI Serial Data In
4 ISPEN# Programming Enable
5 KEY Keypin
6 MODE_TMS Programming Mode
7 GND Ground
8 SCLK_TCK Serial Clock
Table 30 Pinout Lattice Programming Interface
4.24 Battery
The RTC on the COM Express module is buffered with a socketed battery on the base
board.
In order to clear the CMOS memory, the battery voltage to the COM Express module
can be disconnected via jumper J1101.
Type of battery: 2032
Battery socket: Renata SMTU2032-1
4.25 Beeper
A piezo signal generator is implemented for acoustic signals.
Type: Digisound F/DGX05P
4.26 Power Button
For switching the system on a Power push button has been implemented.
The PWR_BTN# signal is low-active and is connected directly to the corresponding pin
of the COM Express module.
Type: C&K JTP-1230F
4.27 Reset Button
There is a push button for resetting the system.
The RESET# signal is low-active and is connected to the SYS_RESET#- pin of the COM
Express module.
Type: C&K JTP-1230F