Z86D73 Datasheet, PDF (8/92 Pages) Zilog, Inc. – 40/44/48-Pin Low-Voltage IR OTP

Z86D73
40/44/48-Pin Low-Voltage IR OTP
2
– Oscillator operational mode: normal high-frequency operation enabled or
32-KHz operation enabled
– Port 0: 0–3 pull-ups
– Port 0: 4–7 pull-ups
– Port 1: 0–3 pull-ups
– Port 1: 4–7 pull-ups
– Port 2: 0–7 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 KΩ ±50% at V_CC=3 V and 450 KΩ ±50% at
V_CC=2 V.
General Description
The Z86D73 is an OTP-based member of the MCU family of IR (infrared) micro-
controllers. With 237 bytes of general-purpose RAM and 32 KB of ROM, 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 Z86D73 architecture is based on ZiLOG’s 8-bit microcontroller core with an
Expanded Register File to allow access to register-mapped peripherals, input/out-
put (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 ancil-
lary features that are useful in many consumer, automotive, computer peripheral,
and battery-operated hand-held applications.
There are four basic address spaces available to support a wide range of configu-
rations: Program Memory, Register File, Expanded Register File, and External
Memory. The register file is composed of 256 bytes of RAM. It includes 4 I/O port
registers, 16 control and status registers, and 236 general-purpose registers. The
Expanded Register File consists of two additional register groups (F and D).
To unburden the program from coping with such real-time problems as generating
complex waveforms or receiving and demodulating complex waveform/pulses, the
Z86D73 offers a new intelligent counter/timer architecture with 8-bit and
16-bit counter/timers (see 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 2).
PS019402-1103
PRELIMINARY