Z86L82 Datasheet, PDF (8/78 Pages) Maxim Integrated Products – 28-Pin Low-Voltage IR Microcontrollers

Z86L82/Z86L85
28-Pin Low-Voltage IR Microcontrollers
2
– 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 K±50% at V_CC=3 V and 450 K±50% at
V_CC=2 V.
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, effi-
cient use of memory, sophisticated interrupts, input/output bit manipulation capa-
bilities, automated pulse generation/reception, and internal key-scan pull-up
transistors.
The Z86L82/85 architecture is based on Maxim's 8-bit microcontroller core featur-
ing an Expanded Register File to allow access to register-mapped peripherals, I/O
circuits, 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 fea-
tures that are useful in many consumer, automotive, computer peripheral, and bat-
tery-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 Z86L82/85 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-select-
able modes and two on-board comparators to process analog signals with sepa-
rate reference voltages (see Figure 9 on page 18).
19-4613; Rev 0; 4/09