WT6132/WT6124/WT6116

Data Sheet Rev. 1.01

Weltrend Semiconductor, Inc.

Page 8

I/O Port C

The structure of I/O Port C is same as Port B except the output low level has 10mA current sink

capability.

Port C Control Register

Name

Addr

R/W Initial

Bit 7

Bit 6

Bit 5

Bit4

Bit 3

Bit 2

Bit 1

Bit 0

PC_CTRL 0004h

W

00h

PC7OE

PC6OE

PC5OE

PC4OE

PC3OE

PC2OE

PC1OE

PC0OE

Bit Name

Description

PCnOE

Port Cn Output Enable.

When it is set, PCn is output pin.

When it is cleared, PCn is input pin with internal pull high

Port C Data Register

Name

Addr

R/W Initial

Bit 7

Bit 6

Bit 5

Bit4

Bit 3

Bit 2

Bit 1

Bit 0

R

00h

PC7

PC6

PC5

PC4

PC3

PC2

PC1

PC0

PC_DATA 0005h

W

00h

PC7

PC6

PC5

PC4

PC3

PC2

PC1

PC0

Bit Name

Description

PCn (W)

This bit controls the output level when the corresponding PCnOE bit is set.

When PCn=1, PCn pin outputs high level.

When PCn=0, PCn pin outputs low level.

PCn (R)

When PCnOE=1 (i.e. output port), this bit is same as PCn (W).

When PCnOE=0, this bit indicates the input level. “1” means high and “0” means low.

I/O Port D

I/O Port D is shared with some special functions. When the special function is disabled, it is an general

I/O port and is same as Port A2. If it is configured as an output, it can source/sink 6mA. If it is configured

as an input, it has an internal pull-up resistor.

Port D Control Register

Name

Addr

R/W Initial

Bit 7

Bit 6

Bit 5

Bit4

Bit 3

Bit 2

Bit 1

Bit 0

PD_CTRL 0006h

W

00h

--

--

PD5OE

PD4OE

PD3OE

PD2OE

PD1OE

PD0OE

Bit Name

Description

PDnOE

Port Dn Output Enable.

When it is set, PDn is output pin.

When it is cleared, PDn is input pin with internal pull high

Port D Data Register

Name

Addr

R/W Initial

Bit 7

Bit 6

Bit 5

Bit4

Bit 3

Bit 2

Bit 1

Bit 0

R

x0h

--

--

PD5

PD4

PD3

PD2

PD1

PD0

PD_DATA 0007h

W

x0h

--

--

PD5

PD4

PD3

PD2

PD1

PD0

Bit Name

Description

PDn (W)

This bit controls the output level when the corresponding PDnOE bit is set.

When PDn=1, PDn pin outputs high level.

When PDn=0, PDn pin outputs low level.

PDn (R)

When PDnOE=1 (i.e. output port), this bit is same as PDn (W).

When PDnOE=0, this bit indicates the input level. “1” means high and “0” means low.