Samsung S3F80JB P4CONH Port 4 Control Register High Byte E2H Set1 Bank1, P4.7 Mode Selection Bits

Models: S3F80JB

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S3F80JBCONTROL REGISTERS

P4CONH — Port 4 Control Register (High Byte)

E2H Set1 Bank1

Bit Identifier

Reset Value

Read/Write

Addressing Mode

.7 and .6

.7

.6

.5

.4

.3

.2

.1

.0

1

1

1

1

1

1

1

1

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Register addressing mode only

 

 

 

 

 

P4.7 Mode Selection Bits

 

 

 

 

 

0 0

C-MOS input mode

 

 

 

 

 

01 Open-drain output mode

10 Push-pull output mode

1 1 C-MOS input with pull up mode

.5 and .4

P4.6 Mode Selection Bits

 

0

0

C-MOS input mode

 

0

1

Open-drain output mode

 

1

0

Push-pull output mode

 

1

1

C-MOS input with pull up mode

.3 and .2

P4.5 Mode Selection Bits

 

0

0

C-MOS input mode

 

 

 

 

 

0

1

Open-drain output mode

 

 

 

 

 

1

0

Push-pull output mode

 

 

 

 

 

1

1

C-MOS input with pull up mode

.1 and .0

P4.4 Mode Selection Bits

 

0

0

C-MOS input mode

 

0

1

Open-drain output mode

 

1

0

Push-pull output mode

 

1

1

C-MOS input with pull up mode

NOTE: After CPU reset, P4.7- P4.4 will be C-MOS input with pull up mode by the reset value of P4CONH register.

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Page 102
Image 102
Samsung S3F80JB manual P4CONH Port 4 Control Register High Byte E2H Set1 Bank1, P4.7 Mode Selection Bits