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)