z86e21 ZiLOG Semiconductor, z86e21 Datasheet - Page 2

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

GENERAL DESCRIPTION (Continued)
2
(Bit Programmable)
Output Input
Counter/
Interrupt
Timers
Control
Port 3
UART
Port 2
(2)
I/O
Functional Block Diagram
Vcc
(Nibble Programmable)
Address or I/O
Register File
256 x 8-Bit
4
Register
FLAGS
Pointer
Port 0
GND
ALU
4
XTAL
Machine Timing and
Instruction Control
/AS /DS R//W /RESET
(Byte Programmable)
Address/Data or I/O
Prg. Memory
8192 x 8-Bit
Program
Counter
Port 1
8