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Z86C21 PDF даташит

Спецификация Z86C21 изготовлена ​​​​«Zilog.» и имеет функцию, называемую «8K ROM Z8 CMOS MICROCONTROLLER».

Детали детали

Номер произв Z86C21
Описание 8K ROM Z8 CMOS MICROCONTROLLER
Производители Zilog.
логотип Zilog. логотип 

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Z86C21 Даташит, Описание, Даташиты
PRODUCT S PECIFICA TION
Z86C21 MCU
WITH 8K ROM
FEATURES
s 8-Bit CMOS MCU with 8 Kbytes of ROM
s 256 Byte Register File
- 236 Bytes of General-Purpose RAM
- 16 Bytes Control/Status Registers
- 4 Bytes for Ports
s 40-Pin DIP, 44-Pin PLCC or 44-Pin QFP Package
s 4.5V to 5.5V Operating Range
s Low Power Consumption: 220 mW (max) @ 16 MHz
s Fast instruction pointer: 1.0 µs @ 12 MHz
s Two Standby Modes: STOP and HALT
s 32 Input/Output Lines
Z86C21
8K ROM Z8® CMOS
MICROCONTROLLER
s Full-Duplex UART
s All Digital Inputs are TTL Levels
s Auto Latches
s RAM and ROM Protect
s Two Programmable 8-Bit Counter/Timers each with
6-Bit Programmable Prescaler.
s Six Vectored, Priority Interrupts from Eight Different
Sources
s Clock Speeds: 12 and 16 MHz
s On-Chip Oscillator that Accepts a Crystal, Ceramic
Resonator, LC, or External Clock Drive.
GENERAL DESCRIPTION
The Z86C21 microcontroller is a member of the Z8 single-
chip microcontroller family with 8 Kbytes of ROM and
236 bytes of RAM. The device is packaged in a 40-pin DIP,
44-pin PLCC, or a 44-pin QFP with a ROMless pin option
available on the 44-pin versions only. With the ROM/
ROMless feature selectively, the Z86C21 offers both exter-
nal memory and preprogrammed ROM, making it well-
suited for high-volume applications or where code flexibil-
ity is required.
Zilog’s CMOS microcontroller offers fast execution, effi-
cient use of memory, sophisticated interrupts, input/output
bit manipulation capabilities, and easy hardware/software
system expansion along with low cost and low power
consumption.
The Z86C21 architecture is characterized by Zilog’s 8-bit
microcontroller core. The device offers a flexible I/O
scheme, an efficient register and address space structure,
multiplexed capabilities between address/data, I/O, and a
number of ancillary features that are useful in many indus-
trial and advanced scientific applications.
For applications demanding powerful I/O capabilities, the
Z86C21 provides 32 pins dedicated to input and output.
These lines are grouped into four ports. Each port consists
of eight lines, and is configurable under software control to
provide timing, status signals, serial or parallel
I/O with or without handshake, and an address/data bus
for interfacing external memory. There are three basic
address spaces available to support this configuration:
Program Memory, Data Memory, and 236 general-pur-
pose registers.
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Z86C21 Даташит, Описание, Даташиты
GENERAL DESCRIPTION (Continued)
Z86C21 MCU
WITH 8K ROM
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.
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
Ground
VCC
GND
VDD
VSS
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
8192 x 8-Bit
Program
Counter
Port 2
Port 0
Port 1
I/O
(Bit Programmable)
44
Address or I/O
(Nibble Programmable)
8
Address/Data or I/O
(Byte Programmable)
Figure 1. Z86C21 Functional Block Diagram
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Z86C21 Даташит, Описание, Даташиты
PIN DESCRIPTION
VCC
XTAL2
XTAL1
P37
P30
/RESET
R//W
/DS
/AS
P35
GND
P32
P00
P01
P02
P03
P04
P05
P06
P07
1
2
3
4
5
6
7
8
9
10
Z86C21
DIP
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
P36
P31
P27
P26
P25
P24
P23
P22
P21
P20
P33
P34
P17
P16
P15
P14
P13
P12
P11
P10
Figure 2. 40-Pin DIP Pin Assignments
Z86C21 MCU
WITH 8K ROM
Table 1. 40-Pin DIP Pin Identification
Pin # Symbol Function
Direction Pin # Symbol Function
Direction
1V
Power Supply
Input
11 GND
Ground
CC
2 XTAL2 Crystal, Oscillator Clock Output 12 P32
Port 3, Pin 2
Input
Input
3 XTAL1 Crystal, Oscillator Clock Input
13-20 P00-P07 Port 0, Pins 0,1,2,3,4,5,6,7 In/Output
4 P37 Port 3, Pin 7
Output
21-28 P10-P17 Port 1, Pins 0,1,2,3,4,5,6,7 In/Output
5 P30 Port 3, Pin 0
Input
29 P34
Port 3, Pin 4
Output
6 /RESET Reset
7
R//W
Read/Write
8 /DS
Data Strobe
9 /AS
Address Strobe
10 P35
Port 3, Pin 5
Input
Output
Output
Output
Output
30
31-38
39
40
P33
P20-P27
P31
P36
Port 3, Pin 3
Input
Port 2, Pins 0,1,2,3,4,5,6,7 In/Output
Port 3, Pin 1
Input
Port 3, Pin 6
Output
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