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Z86C21 датащи(PDF) 2 Page - Zilog, Inc.

номер детали Z86C21
подробное описание детали  8K ROM Z8 CMOS MICROCONTROLLER
PDF  35 Pages
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производитель  ZILOG [Zilog, Inc.]
домашняя страница  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z86C21 датащи(HTML) 2 Page - Zilog, Inc.

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Z86C21 MCU
WITH
8K ROM
GENERAL DESCRIPTION (Continued)
To unburden the program from coping with the real-time
tasks, such as counting/timing and serial data communi-
cation, the Z86C21 offers two on-chip counter/timers with
a large number of user selectable modes, and an on-board
UART.
Port 3
UART
Counter/
Timers
(2)
Interrupt
Control
Port 2
I/O
(Bit Programmable)
ALU
FLAGS
Register
Pointer
Register File
256 x 8-Bit
Machine Timing and
Instruction Control
Prg. Memory
8192 x 8-Bit
Program
Counter
Vcc
GND
XTAL
44
Port 0
Output
Input
Address or I/O
(Nibble Programmable)
8
Port 1
Address/Data or I/O
(Byte Programmable)
/AS /DS R//W /RESET
Figure 1. Z86C21 Functional Block Diagram
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
Circuit
Device
Power
V
CC
V
DD
Ground
GND
V
SS



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