H8SSLASH2214 datasheet(400/936 Pages) RENESAS

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Section 9 I/O Ports

Rev.4.00 Sep. 18, 2008 Page 340 of 872

REJ09B0189-0400

PDPCR is an 8-bit readable/writable register that controls the MOS input pull-up function

incorporated into port D on a bit-by-bit basis.

PDPCR is valid for port input pins (mode 7). When a PDDDR bit is cleared to 0 (input port

setting), setting the corresponding PDPCR bit to 1 turns on the MOS input pull-up for the

corresponding pin.

PDPCR is initialized to H'00 by a power-on reset and in hardware standby mode. It retains its

previous state after a manual reset and in software standby mode.

9.10.3

Pin Functions in Each Mode

(1) Modes 4 to 6

In modes 4 to 6, port D pins function as data input/output pins automatically. Port D pin functions

in modes 4 to 6 are shown in figure 9.13.

D15 (input/output)

D14 (input/output)

D13 (input/output)

D12 (input/output)

D11 (input/output)

D10 (input/output)

D9 (input/output)

D8 (input/output)

Port D

Figure 9.13 Port D Pin Functions (Modes 4 to 6)

(2) Mode 7

In mode 7, port D functions as an I/O port, and input or output can be specified bit by bit. Setting a

PDDDR bit to 1 makes the corresponding port D pin an output port, while clearing the bit to 0

makes the pin an input port.

Port D pin functions in mode 7 are shown in figure 9.14.

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