VR4102 datasheet(365/701 Pages) NEC

365 / 701 page

CHAPTER 18 GIU (GENERAL PURPOSE I/O UNIT)

365

18.2.3 GIUPIODL (0x0B00 0104)

Bit

D15

D14

D13

D12

D11

D10

Name

PIOD[15]

PIOD[14]

PIOD[13]

PIOD[12]

PIOD[11]

PIOD[10]

PIOD[9]

PIOD[8]

R/W

RTCRST

Other resets

Bit

D6D5

D4D3D2

Name

PIOD[7]

PIOD[6]

PIOD[5]

PIOD[4]

PIOD[3]

PIOD[2]

PIOD[1]

PIOD[0]

R/W

RTCRST

Other resets

Bit

Name

Function

D[15..0]

PIOD[15..0]

GPIO pin output data specification

1 : High

0 : Low

This register is used to read GPIO pins and write data. The PIOD[15..0] bits correspond to the GPIO[15..0] pins.

When “1” is set to the corresponding IOS bit in the GIUIOSELL register (GPIO Input/Output Select Register), the

data written to the PIOD bit is output via the corresponding GPIO pin.

When the value of the corresponding IOS bit in the GIUIOSELL register (GPIO Input/Output Select Register) is

“0”, writing a value to the PIOD bit does not affect the GPIO pin (the write data is ignored).

When the value of the IOS bit in the GIUIOSELL register (GPIO Input/Output Select Register) is “0”, reading the

PIOD bit enables the corresponding GPIO pin’s state to be read.

Caution

Since PIOD[15] (GPIO[15] (DCD#)) is fixed as input, write data cannot be output via this pin.

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