z86e21 ZiLOG Semiconductor, z86e21 Datasheet - Page 5

• Manufacturer Part Number: z86e21
• Description: Cmos Z8 Otp Microcontroller
• Manufacturer: ZiLOG Semiconductor

Pin #
1-5
6
7-14
15
16
17-21
22
23-25
26
27
28
29
30
Symbol
P03-P07
GND
P10-P17
P34
P33
P20-P24
GND
P25-P27
P31
P36
GND
V
XTAL2
CC
Function
Port 0 pin 3,4,5,6,7
Ground, GND
Port 1 pin 0,1,2,3,4,5,6,7 In/Output
Port 3 pin 4
Port 3 pin 3
Port 2 pin 0,1,2,3,4
Ground, GND
Port 2 pin 5,6,7
Port 3 pin 1
Port 3 pin 6
Ground, GND
Power Supply
Crystal, Oscillator Clock
/RESET
R//RL
R//W
GND
P35
P32
P00
P01
P02
/DS
/AS
34
35
36
37
38
39
40
41
42
43
44
44-Lead QFP Pin Assignments
44-Lead QFP Pin Identification
33 32 31 30 29 28 27 26 25 24 23
1
2
Direction
In/Output
Input
Output
Input
In/Output
Input
In/Output
Input
Output
Input
Input
Output
3
4
5
Z86E21
QFP
6
7
Pin #
31
32
33
34
35
36
37
38
39
40
41-43
44
8
9
10
Symbol
XTAL1
P37
P30
/RESET
R//W
/DS
/AS
P35
GND
P32
P00-P02
R//RL
11
22
21
20
19
18
17
16
15
14
13
12
Function
Crystal, Oscillator Clock
Port 3 pin 7
Port 3 pin 0
Reset
Read/Write
Data Strobe
Address Strobe
Port 3 pin 5
Ground, GND
Port 3 pin 2
Port 0 pin 0,1,2
ROM/ROMless control
GND
P24
P23
P22
P21
P20
P33
P34
P17
P16
P15
Direction
Input
Output
Input
Input
Output
Output
Output
Output
Input
Input
In/Output
Input
5