CONTROL REGISTERSS3C84E5/C84E9/P84E9

P1CONH — Port 1 Control Register (High Byte)

E8H Set 1, Bank 0

Bit Identifier

Reset Value

Read/Write Addressing Mode

.7–.4

.3–.2

.7

.6

.5

.4

.3

.2

.1

.0

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

0

R/W

R/W

R/W

R/W

Register addressing mode only

Not used for the S3C84E5/C84E9/P84E9 (must keep always 0)

P1.5/TXD Configuration Bits

0

0 Input mode with pull-up

01 Input mode

10 Push-pull output mode

1

1 Alternative function mode: TXD output

.1–.0

P1.4/RXD Configuration Bits

 

0

0

Input mode with pull-up; RXD input

 

 

 

 

 

0

1

Input mode; RXD input

 

 

 

 

 

1

0

Push-pull output mode

 

 

 

 

 

1

1

Alternative function mode: RXD output

 

 

 

 

4-16

Page 85
Image 85
Samsung S3C84E5 user manual P1CONH Port 1 Control Register High Byte E8H Set 1, Bank, P1.5/TXD Configuration Bits