z86e21 ZiLOG Semiconductor, z86e21 Datasheet - Page 4

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

PIN DESCRIPTION (Continued)
Standard Mode
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
4
Symbol
V
XTAL2
XTAL1
P37
P30
N/C
/RESET
R//W
/DS
/AS
P35
GND
P32
CC
Function
Power Supply
Crystal, Oscillator Clock
Crystal, Oscillator Clock
Port 3 pin 7
Port 3 pin 0
Not Connected
Reset
Read/Write
Data Strobe
Address Strobe
Port 3 pin 5
Port 3 pin 2
Ground, GND
/RESET
R//RL
R//W
GND
P35
P32
P00
P01
P02
/DS
/AS
10
11
12
13
14
15
16
17
7
8
9
18 19 20 21 22 23 24 25 26 27 28
44-Lead PLCC Pin Assignments
44-Lead PLCC Pin Identification
6
5
Direction
Input
Output
Input
Output
Input
Input
Input
Output
Output
Output
Output
Input
Input
4
3
Z86E21
2
PLCC
1 44 43 42 41 40
Pin #
14-16
17
18-22
23-27
28
29-31
32
33
34-38
39
40-42
43
44
Symbol
P00-P02
R//RL
P03-P07
P10-P14
N/C
P15-P17
P34
P33
P20-P24
N/C
P25-P27
P31
P36
39
38
37
36
35
34
33
32
31
30
29
Function
Port 0 pin 0,1,2
ROM/ROMless control
Port 0 pin 3,4,5,6,7
Port 1 pin 0,1,2,3,4
Not Connected
Port 1 pin 5,6,7
Port 3 pin 4
Port 3 pin 3
Port 2 pin 0,1,2,3,4
Not Connected
Port 2 pin 5,6,7
Port 3 pin 1
Port 3 pin 6
N/C
P24
P23
P22
P21
P20
P33
P34
P17
P16
P15
Direction
In/Output
Input
In/Output
In/Output
Input
In/Output
Output
Input
In/Output
Input
In/Output
Input
Output