Specifications

Serial Communications (V40)
OVERVIEW
This chapter describes the Serial Control Unit (SCU) and provides
register descriptions and baud rate information.
The SCU is a single serial channel that performs asynchronous serial
communication between the V40 and a serial device external to the
ZT 8832.
The major features of the SCU are listed below.
• Full-duplex asynchronous operation
• Clock divisor of 16 or 64
• Baud rates to 38.4 Kbaud
• Programmable character format
• Automatic break detect and handling
• Parity, overrun, and framing detection
• Interrupt and polled operation
ZT 8832 SPECIFICS
The SCU is implemented as a 3-wire RS-232-C serial port, including
Transmit Data (TxD), Receive Data (RxD), and Ground (GND).
These signals are available at connector J5; pin assignments are
shown on page B-16.
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