Decode Board (Ttl) Output To Host Connector - Honeywell IS4921 Integration Manual

Decode Board (TTL) Output to Host Connector

Pin Signal Name
1 232INV
2 Vin
3 GND
4 (n)RxD
5 (n)TxD
6 (n)CTS
7 (n)RTS
8 PWRDWN
9 nBEEPER
10 nGoodRead
11 nWAKE
12 nTrig
Figure 35. Decode Board (TTL) Output Connector
Input: TTL RS232 polarity control with 32k ohm pull-up.
Power: Supply voltage input (3V to 5.5V)
Ground: Power and signal ground.
Input: TTL Level RS232 Receive data input.
Output: TTL Level RS232 transmit data.
Input: TTL level Clear to Send.
Output: TTL level RS232 Request to Send.
Output: active high = IS4920 is in power down mode.
Output: active low signal capable of sinking current.
Output: active low signal for sinking current (Good Read).
Input: Signal used to bring engine out of power-down.
Input: Signal used as trigger input to activate the IS4920
Function
41