Z86L82 Datasheet, PDF (9/80 Pages) Maxim Integrated Products – 28-Pin Low-Voltage IR Microcontrollers

Z86L82/85/88
28-Pin Low-Voltage IR Microcontrollers
2
• 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 (.5V_DD input threshold) versus
Mouse Mode (.4V_DD input threshold)
Note: The mask option pull-up transistor has a typical equivalent
resistance of 200 KW ±50% at V_CC=3 V and 450 KW ±50% at
V_CC=2 V.
General Description
The Z86L82/85/88 are ROM-based members of the Z8 MCU single-chip family of
infrared (IR) controllers, featuring 237 bytes of general-purpose RAM and 4/8/16
KB of ROM, respectively. 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.
The Z86L8X architecture is based on ZiLOG's 8-bit microcontroller core featuring
an Expanded Register File to allow access to register-mapped peripherals, I/O cir-
cuits, and powerful counter/timer circuitry. The Z8 offers a flexible I/O scheme, an
efficient register and address-space structure, and a number of ancillary features
that are useful in many consumer, automotive, computer peripheral, and battery-
operated hand-held applications.
Three basic address spaces are available to support a wide range of configura-
tions: program memory, register file, and Expanded Register File. The register file
consists of 256 bytes of RAM. It includes 4 I/O port registers, 16 control and status
registers, and 236 general-purpose registers. [Register FEh (SPH) can be used
as a general-purpose register.] The Expanded Register File consists of two addi-
tional register groups (F and D).
The Z86L8X offers a new intelligent counter/timer architecture with 8-bit and 16-bit
counter/timers (Figure 1). Also included are a large number of user-selectable
modes and two on-board comparators to process analog signals with separate
reference voltages (see Figure 9 on page 18).
PS009007-1202