z86l88 ZiLOG Semiconductor, z86l88 Datasheet - Page 9

• Manufacturer Part Number: z86l88
• Description: Low-voltage Ir Microcontroller
• Manufacturer: ZiLOG Semiconductor

General Description
PS024102-0804
Note:
The Z86L88 is a ROM-based member of the Z8 MCU single-chip family of infrared
(IR) controllers, featuring 237 bytes of general-purpose RAM and 16 KB of ROM,
respectively. ZiLOG’s CMOS microcontrollers offer fast executing, efficient use of
memory, sophisticated interrupts, input/output bit manipulation capabilities, auto-
mated pulse generation/reception, and internal key-scan pull-up transistors.
The Z86L88 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 Z86L88 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).
–
–
–
–
–
–
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
Mouse Mode (.4V
The mask option pull-up transistor has a typical equivalent
resistance of 200 K
V
CC
=2 V.
DD
Ω ±
input threshold)
50% at V
CC
=3 V and 450 K
Low-Voltage IR Microcontroller
DD
input threshold) versus
Ω ±
50% at
Z86L88
2