Panasonic F77G, MN101C77C user manual Block Diagram P20, P22 to P24

Models: F77G MN101C77C

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Chapter 4 I/O Ports

4-4-3 Block Diagram

Pull-up resistor control

I/O direction control

Data bus

Port outut data

Port input data

External interrupt

Reset

RP2PLU0,2-4

D Q

Write

 

L

 

Read

 

 

Reset

RP2DIR0,2-4

D Q

Write

 

L

 

Read

 

 

Reset

RP2OUT0,2-4

D Q

Write

L

Read

P2IN0,2-4

Read

Schmitt trigger input

P20,P22-P24

Pull-up resistor control

I/O direction control

Port output data

Port input data

NFCTR register bp7

AC zero-cross input

External intrerrupt

 

Figure 4-4-2 Block Diagram (P20, P22 to P24)

 

 

Reset

 

 

 

 

R

P2PLU1

 

 

 

D Q

 

 

 

Write

L

Read

 

 

 

Reset

 

 

 

 

R

P2DIR1

 

 

 

D Q

 

 

Data

Write

L

Read

 

 

 

 

 

bus

 

Reset

 

 

 

 

 

 

 

 

R

P2OUT1

 

 

 

D Q

 

 

Write

L

Read

 

 

 

 

M

1

 

 

 

AC zero-cross

 

 

 

P2IN1

detection circuit

 

 

 

U

0

 

 

Read

X

 

 

 

 

 

Schmitt trigger input

 

 

Figure 4-4-3 Block Diagram (P21)

P21

Port 2 IV - 19

Page 169
Image 169
Panasonic F77G, MN101C77C user manual Block Diagram P20, P22 to P24