GENERAL DESCRIPTION

The Z80189/Z8L189 are cost-effective modem controllers that address a new generation of data pumps having the HDLC formatting feature. Data pumps of these types do not require an HDLC interface; therefore, the Z80189 does not need the ESCC™. The addition of the PC DMA Mailbox Registers allow DMA data transfer between the PC memory and the modem speaker/microphone CODEC. The Z80189 is a smart peripheral controller chip for modem (in particular V.34 applications), fax, voice messaging, and other communications applications.

FEATURES

■ Fully Static Z180™ MPU Core*

– On-Chip 1 MByte MMU

– Two Enhanced UART Channels (up to 512 Kbps)†

– Two Chain-Linked DMA Channels†

– x 2 Clock Multiplier

– Low-Power Consumption Modes

– Two 16-Bit Timer/Counters

– Clocked Serial I/O

– On-Chip Wait State Generator (WSG)

– On-Chip Interrupt Controller

– On-Chip Clock Oscillator/Generator

■ 16550 Compatible MIMIC Interface

– 16 mA MIMIC Output Drive Capability

■ Com Port Decode

■ PC DMA Mailbox Registers

■ Host I/O Mailbox

■ Programmable Fixed /ROMCS and

/RAMCS Boundaries

■ 100-Pin QFP and VQFP Packages

■ 3.3 and 5.0-Volt Operating Ranges

■ 0°C to +70°C Temperature Range