General Description

The Z86L825/826/827 are ROM-based members of the Z8 MCU single-chip family of IR (infrared) with 237 bytes of general-purpose RAM and 4 KB of ROM. ZiLOG’s CMOS microcontrollers offer fast executing, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, automated pulse generation/reception, and internal key-scan pull-up transistors.

Features

• Low power consumption–60 mW (typical)

• Three standby modes

– STOP—2 µA

– HALT—0.8 mA

– Low voltage

• Special architecture to automate both generation and reception of complex

pulses or signals:

– One programmable 8-bit counter/timer with two capture registers and two

load registers

– One programmable 16-bit counter/timer with one 16-bit capture register

pair and one 16-bit load register pair

– Programmable input glitch filter for pulse reception

• Six priority interrupts

– Three external

– Two assigned to counter/timers

– One low battery voltage detection interrupt

• Low battery voltage detection with flag

• Programmable watch-dog/power-on reset circuits

• Two independent comparators with programmable interrupt polarity

• Mask selectable 200±50 KΩ transistor pull-ups on Ports 2 and 3. Port 0

always has pull-up selected.

– Programmable mask options:

– Oscillator selection: RC oscillator versus crystal or other clock source

– Oscillator operational mode: normal high-frequency operation enabled or

32-KHz operation enabled

– Port 2: 0–7 pull-ups

– Port 3: pull-ups

– Port 0: 0–3 Mouse Mode: Normal Mode(.5VDD input threshold) versus

Mouse Mode (.4VDD input threshold)