H83069RF datasheet(283/1003 Pages) RENESAS

283 / 1003 page

Rev. 5.0, 09/04, page 261 of 978

In modes 1 to 4, P2DDR bits are always read as 1, and cannot be modified.

In modes 5 and 7, P2DDR is a write-only register. Its value cannot be read. All bits return 1 when

read.

P2DDR is initialized to H'FF in modes 1 to 4, and to H'00 in modes 5 and 7, by a reset and in

hardware standby mode. In software standby mode it retains its previous setting. Therefore, if a

transition is made to software standby mode while port 2 is functioning as an input/output port

and a P2DDR bit is set to 1, the corresponding pin maintains its output state.

Port 2 Data Register (P2DR): P2DR is an 8-bit readable/writable register that stores output data

for port 2. When port 2 functions as an output port, the value of this register is output. When a bit

in P2DDR is set to 1, if port 2 is read the value of the corresponding P2DR bit is returned. When a

bit in P2DDR is cleared to 0, if port 2 is read the corresponding pin logic level is read.

Bit

Initial value

Read/Write

R/W

Port 2 data 7 to 0

These bits store data for port 2 pins

R/W

P2DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it

retains its previous setting.

Port 2 Input Pull-Up MOS Control Register (P2PCR): P2PCR is an 8-bit readable/writable

Bit

Initial value

Read/Write

P2 PCR

R/W

Port 2 input pull-up MOS control 7 to 0

These bits control input pull-up

transistors built into port 2

P2 PCR

R/W

P2 PCR

R/W

P2 PCR

R/W

P2 PCR

R/W

P2 PCR

R/W

P2 PCR

R/W

P2 PCR

R/W

In modes 5 and 7, when a P2DDR bit is cleared to 0 (selecting generic input), if the corresponding

bit in P2PCR is set to 1, the input pull-up transistor is turned on.

P2PCR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode

it retains its previous setting.

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