MC146805E2CFN INNOVASIC [InnovASIC, Inc], MC146805E2CFN Datasheet - Page 4

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

IA6805E2
Microprocessor Unit
Copyright
innovASIC
I/O Port Circuitry and Register Configuration:
2002
The End of Obsolescence
Figure 2. PA0-PA7/PB0-PB7 (Input/Output Lines)
R/W-n DDR
0
0
1
1
DATA DIRECTION
REGISTER
FROM
AND
CPU
TO
A(B)
PORT A(B)
REGISTER
PIN
0
1
0
1
(DDB7)
DDA7
(PB7)
DATA DIRECTION
PA7
7
The I/O pin is in input mode. Data is
written into the output data latch.
Data is written into the output data latch and
output to the I/O pin.
The state of the I/O pin is read.
the I/O pin is in an output mode. The
output data latch is read.
REGISTER
LATCHED
DATA BIT
OUTPUT
BIT
(DDB6)
DDA6
(PB6)
I/O Pin Functions
PA6
6
(DDB5)
DDA5
(PB5)
PA5
ENG21108140100
5
Page 4 of 31
(DDB4)
DDA4
(PB4)
INPUT
PA4
REG
BIT
4
I/O Pin Functions
(DDB3)
DDA3
(PB3)
PA3
3
(DDB2)
DDA2
(PB2)
PA2
INPUT
2
PIN
I/O
OUTPUT
(DDB1)
DDA1
(PB1)
PA1
1
(DDB0)
DDA0
(PB0)
PA0
0
$0004 ($0005)
$0000 ($0001)
As of Production Version 00
PIN
I/O
Data Sheet
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