Z86C61 Datasheet, PDF (2/46 Pages) Zilog, Inc. – CMOS Z8 MICROCONTROLLER

GENERAL DESCRIPTION (Continued)
There are three basic address spaces available to support
this configuration: Program Memory, Data Memory, and
236 General-Purpose Registers.
To unburden the program from coping with the real-time
tasks, such as counting/timing and serial data communi-
cation, the Z86C61/62/96 offers two on-chip counter/tim-
ers with a large number of user selectable modes, and an
on-board UART (Figures 1, 2, and 3).
Z86C61/62/96
Z8^® MICROCONTROLLER
Notes:
All Signals with a preceding front slash, "/", are active Low, e.g.,
B//W (WORD is active Low); /B/W (BYTE is active Low, only).
Power connections follow conventional descriptions below:
Connection
Power
Ground
Circuit
V_CC
GND
Device
V_DD
V
SS
Output Input
Vcc GND
XTAL /AS /DS R//W /RESET
Port 3
UART
Counter/
Timers
(2)
Interrupt
Control
ALU
FLAGS
Register
Pointer
Register File
256 x 8-Bit
Machine Timing and
Instruction Control
Prg. Memory
16,384
x 8-Bit
Program
Counter
Port 2
I/O
(Bit Programmable)
Port 0
Port 1
4
4
Address or I/O
(Nibble Programmable)
8
Address/Data or I/O
(Byte Programmable)
Figure 1. Z86C61 Functional Block Diagram
2