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PDF Z86E21 Data sheet ( Hoja de datos )
| Número de pieza | Z86E21 | |
| Descripción | CMOS Z8 OTP MICROCONTROLLER | |
| Fabricantes | Zilog. | |
| Logotipo |  |
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CUSTOMER P ROCUREMENT S PECIFICA TION
GENERAL DESCRIPTION
The Z86E21 microcontroller (MCU) introduces the next
level of sophistication to single-chip architecture. The
Z86E21 is a member of the Z8 single-chip microcontroller
family with 8 Kbytes of EPROM and 236 bytes of general
purpose RAM.
The Z86E21 is a pin compatible, One-Time-Programmable
(OTP) version of the Z86C21. The Z86E21 contains 8
Kbytes of EPROM memory in place of the 8 Kbyte of ROM
on the Z86C21.
The MCU is housed in a 40-pin DIP, 44-pin Leaded Chip-
Carrier, or a 44-pin Quad Flat Pack, and is manufactured
in CMOS technology. The ROMless pin option is available
on the 44-pin versions only. The MCU can address both
external memory and preprogrammed ROM which en-
ables this Z8 microcomputer to be used in high volume
applications or where code flexibility 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 Z86E21 architecture is based on 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.
Z86E21
CMOS Z8® OTP
MICROCONTROLLER
The device applications demand powerful I/O capabilities.
The Z86E21 fulfills this with 32-pin 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 wide range of configuration: Program Memory, Data
Memory and 236 General-Purpose registers.
To unburden the program from coping with real-time
problems such as counting/timing and serial data commu-
nication, the Z86E21 offers two on-chip counter/timers with
a large number of user selectable modes, and an asyn-
chronous receiver/transmitter (UART) (see Functional Block
Description).
In ROM Protect Mode, the instructions LDC, LDCI, LDE
and LDEI are disabled when reading address locations
%0000 to %1FFF.
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
PRODUCT RECOMMENDATIONS
Zilog recommends the following programming equipment for use with this One-Time-Programmable product:
Device
Z86E21
Z86E21
Z86E21
Zilog Support Tool
Z86C1200ZEM ICEBOX™ Emulator* (*Does not support 4K/8K option.)
Data I/O 3900 Programmer* (*Does not support option bits.)
Data I/O Unisite Programmer* (*Does not support option bits.)
Recommended Revision Level
Hardware
Software
B 1.5
1.1
3.7
Some non-Zilog programmers may have different pro-
gramming waveforms, voltages and timings and not all
programmers may meet the programming requirements of
Zilog's One-Time-Programmable products.
If difficulty is encountered in programming a Zilog OTP
product, please contact your local Zilog sales office.
DC-2964-10
1
1 page  
/RESET
R//W
/DS
/AS
P35
GND
P32
P00
P01
P02
R//RL
33 32 31 30 29 28 27 26 25 24 23
34
35
36
37
38
39
Z86E21
QFP
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
1 2 3 4 5 6 7 8 9 10 11
GND
P24
P23
P22
P21
P20
P33
P34
P17
P16
P15
44-Lead QFP Pin Assignments
44-Lead QFP Pin Identification
Pin # Symbol Function
Direction Pin # Symbol Function
Direction
1-5
6
7-14
15
P03-P07
GND
P10-P17
P34
Port 0 pin 3,4,5,6,7
Ground, GND
Port 1 pin 0,1,2,3,4,5,6,7
Port 3 pin 4
In/Output
Input
In/Output
Output
31
32
33
34
XTAL1
P37
P30
/RESET
Crystal, Oscillator Clock
Port 3 pin 7
Port 3 pin 0
Reset
Input
Output
Input
Input
16
17-21
22
23-25
P33
P20-P24
GND
P25-P27
Port 3 pin 3
Port 2 pin 0,1,2,3,4
Ground, GND
Port 2 pin 5,6,7
Input
In/Output
Input
In/Output
26 P31
Port 3 pin 1
Input
27 P36
Port 3 pin 6
Output
28 GND
Ground, GND
Input
29 V
Power Supply
Input
CC
30 XTAL2 Crystal, Oscillator Clock Output
35 R//W
36 /DS
37 /AS
38 P35
Read/Write
Data Strobe
Address Strobe
Port 3 pin 5
39
40
41-43
44
GND
P32
P00-P02
R//RL
Ground, GND
Port 3 pin 2
Port 0 pin 0,1,2
ROM/ROMless control
Output
Output
Output
Output
Input
Input
In/Output
Input
5
5 Page 
AC CHARACTERISTICS
Handshake Timing Diagrams
Data In
/DAV
(Input)
RDY
(Output)
Data In Valid
12
3
Delayed DAV
4
Next Data In Valid
5
Delayed RDY
Input Handshake Timing
6
Data Out
/DAV
(Output)
RDY
(Input)
Data Out Valid
Next Data Out Valid
7
Delayed DAV
89
11
10
Delayed RDY
Output Handshake Timing
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet Z86E21.PDF ] | |
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