1-8
J3 — Misc.
This connector contains miscellaneous Power Managem ent sig nals and the TTL se rial.
Table 1-3. Miscellaneous Power Management and TTL Wiring
Pin # Signal Pin # Signal
1 TTL_TX3 2 TTL_RX1
3 TTL_RX3 4 TTL_TX1
5 TTL_GND 6 SMBALRT
7 TTL_TX4 8 SMBDATA
9 TTL_RX4 10 SMBCLK
J4 — Keyboard
You can use J4 to connect a PS/2 keyboard. J4 is a standard 5-pin DIN connector.
J5 — Mouse
You can use J5 to connect a PS/2 mouse. J5 is a standard 6-pin mini-DIN connector.
Switch Descriptions (S1 – S5)There are five switches on the I/O Development Board. They’re described in Table 1-4.
Table 1-4. I/O Development Board Switches
Switch Name Description
S1 LID Power management input: causes an SMI to simulate a laptop lid closure.
S2 PWR Power management input (push-button switch): when pushed for 6
seconds, it powers down the board. When pressed again, the board
powers up.
S3 LO BAT Power management input: causes an SMI to simulate a low-battery
condition.
S4 RESET Standard Reset signal to the Little Board
S5 RI Ring Indicator: causes an SMI to simulate a laptop modem ring.