z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 131

• Manufacturer Part Number: z80189
• Description: Z80180, Z8s180, Z8l180 Mpu Operation
• Manufacturer: ZiLOG Semiconductor

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UM005003-0703
Z8018x
Family MPU User Manual
The key functions for ASCI on Z80180, Z8S180 and Z8L180 class
processors are listed below. Each channel is independently
programmable.
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ASCI Block Diagram for the Z8S180/Z8L180-Class
Processors
Figure 52 illustrates the ASCI block diagram.
Full-duplex communication
7- or 8-bit data length
Program controlled 9th data bit for multiprocessor communication
1 or 2 stop bits
Odd, even, no parity
Parity, overrun, framing error detection
Programmable baud rate generator, /16 and /64 modes
Modem control signals – Channel 0 contains DCD0, CTS0 and RTS0;
Channel 1 contains CTS1
Programmable interrupt condition enable and disable
Operation with on-chip DMAC