MC146805E2CFN INNOVASIC [InnovASIC, Inc], MC146805E2CFN Datasheet - Page 2

• Manufacturer Part Number: MC146805E2CFN
• Description: Microprocessor Unit
• Manufacturer: INNOVASIC [InnovASIC, Inc]

IA6805E2
Microprocessor Unit
Description
The IA6805E2 (CMOS) Microprocessor Unit (MPU) is a low cost, low power MPU. It features a
CPU, on-chip RAM, parallel I/O compatibility with pins programmable as input or output. The
following paragraphs will further describe this system block diagram and design in more detail.
Copyright
innovASIC
LINES
LINES
PORT
PORT
I/O
I/O
A
B
2002
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
The End of Obsolescence
TIMER
PA0
PORT
PORT
REG
REG
A
B
PRESCALER
DATA
DATA
REG
REG
DIR
DIR
TIMER CONTROL
Figure 1. System Block Diagram
COUNTER
TIMER/
8
8
5
6
5
8
ACCUMULATOR
CONDITION
REGISTER
REGISTER
PROGRAM
PROGRAM
COUNTER
COUNTER
POINTER
STACK
INDEX
CODE
HIGH
LOW
PCH
PCL
ENG21108140100
CC
SP
A
X
OSC1
Page 2 of 31
OSCILLATOR
CPU
OSC2
CONTROL
112x8
RAM
CPU
ALU
RESET_N
IRQ_N
As of Production Version 00
LI
ADDRESS
CONTROL
DRIVE
DRIVE
MUX
BUS
BUS
Data Sheet
www.innovasic.com
Customer Support:
B0
B1
B2
B3
B4
B5
B6
B7
A8
A9
A10
A11
A12
AS
DS
RW_N
1-888-824-4184
MULTIPLEXED
ADDRESS
ADDRESS
ADDRESS STROBE
DATA
DATA STROBE
BUS
BUS
READ/WRITE