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 K
Ω
±
50% at V
CC
=3 V and 450 K
Ω
±
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
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ZILOG [ ZILOG, INC. ]
