User's Manual

Configuring the IM4 as a Serial Module
IM4 Module Integration Guide 11
Configuring the IM4 as a Serial Module
In Serial mode, the IM4 interface provides two 16C850 UART channels,
one SPI channel, eight auxiliary inputs, and eight auxiliary outputs. The
IM4 appears as a serial port and you can use a communications program,
such as HyperTerminal, to communicate with it using the Basic Reader
Interface (BRI). For more information on the BRI, see the Basic Reader
Interface (BRI) Programmer’s Reference Guide (P/N 937-000-xxx).
All signals are 3.3 V logic levels (5 V tolerant inputs).
Pins 7 (NC), 44 (IORD#), and 45 (IOWR#) determine if the IM4 operates
in PC Card mode or in Serial mode. If the three signals are grounded, the
IM4 operates as a serial module.
19 A16 Address bit 16 53 A22 Address bit 22
20 A15 Address bit 15 54 A23 Address bit 23
21 A12 Address bit 12 55 A24 Address bit 24
22 A7 Address bit 7 56 A25 Address bit 25
23 A6 Address bit 6 57 VS2# Voltage sense 2 (not connected)
24 A5 Address bit 5 58 RESET Reset from host
25 A4 Address bit 4 59 WAIT# Extend bus cycle
26 A3 Address bit 3 60 INPACK# Input port acknowledge
27 A2 Address bit 2 61 REG# Register select and I/O enable
28 A1 Address bit 1 62 SPKR# Audio digital waveform
29 A0 Address bit 0 63 STSCHG# Card status changed
30 D0 Data bit 0 64 D8 Data bit 8
31 D1 Data bit 1 65 D9 Data bit 9
32 D2 Data bit 2 66 D10 Data bit 10
33 WP/IOIS16# Write protect in Memory
mode. I/O port is 16-bit in
I/O mode
67 CD2# Card detect 2 (GND)
34 GND Ground Vss 68 GND Ground Vss
PC Card Module Pinout (continued)
Pin No. Pin Name Definition Pin No. Pin Name Definition
Serial Module Voltage Levels
Low High Notes
Inputs 0 V to 0.8 V 2.4 V to 5.5 V Input current is ±10 μA max
Outputs 0.4 V Max @ 8 mA 2.9 V min @ -8 mA
Note: Pins with a # in the pin name indicate an active low signal.
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