Z86C21 Datasheet PDF - Zilog

GENERAL DESCRIPTION
The Z86C21 microcontroller is a member of the Z8 single-chip microcontroller family with 8 Kbytes of ROM and 236 bytes of RAM. The device is packaged in a 40-pin DIP, 44-pin PLCC, or a 44-pin QFP with a ROMless pin option available on the 44-pin versions only. With the ROM/ROMless feature selectively, the Z86C21 offers both external memory and preprogrammed ROM, making it wellsuited for high-volume applications or where code flexibility is required.
   
FEATURES
â–  8-Bit CMOS MCU with 8 Kbytes of ROM
â–  256 Byte Register File
    - 236 Bytes of General-Purpose RAM
    - 16 Bytes Control/Status Registers
    - 4 Bytes for Ports
â–  40-Pin DIP, 44-Pin PLCC or 44-Pin QFP Package
â–  4.5V to 5.5V Operating Range
â–  Low Power Consumption: 220 mW (max) @ 16 MHz
■ Fast instruction pointer: 1.0 µs @ 12 MHz
â–  Two Standby Modes: STOP and HALT
â–  32 Input/Output Lines
    FEATURES
â–  Full-Duplex UART
â–  All Digital Inputs are TTL Levels
â–  Auto Latches
â–  RAM and ROM Protect
â–  Two Programmable 8-Bit Counter/Timers each with
    6-Bit Programmable Prescaler.
â–  Six Vectored, Priority Interrupts from Eight Different
    Sources
â–  Clock Speeds: 12 and 16 MHz
â–  On-Chip Oscillator that Accepts a Crystal, Ceramic
    Resonator, LC, or External Clock Drive.