General Description

The Z86L82/85 are ROM-based members of the Z8 MCU single-chip family of infrared (IR) controllers, featuring 237 bytes of general-purpose RAM and 4/8 KB of ROM, respectively. Maxim’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—40 mW (typical)

• Three standby modes

   – STOP—2 μA (typical)

   – HALT—0.8 mA (typical)

   – 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

• Five priority interrupts

   – Three external

   – Two assigned to counter/timers

• Low voltage protection

• Programmable watch-dog/power-on reset circuits

• Two independent comparators with programmable interrupt polarity

• Mask-selectable pull-up transistor on Ports 0, 2, and 3

• Programmable mask options:

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

   – Oscillator operational mode: normal high-frequency operation enabled versus 32-KHz operation enabled

   – Port 0: 0–3 pull-ups

   – Port 0: 4–7 pull-ups

   – 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)