H8SLASH3021 datasheet(176/712 Pages) RENESAS

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7. I/O Ports

Rev.2.00 Mar. 22, 2007 Page 152 of 684

REJ09B0352-0200

Table 7.8

Port 6 Registers

Initial Value

Address*

Name

Abbreviation

R/W

Modes 1, 3, 5, and 6

Mode 7

H'FFC9

Port 6 data

direction register

P6DDR

H'F8

H'80

H'FFCB

Port 6 data

P6DR

R/W

H'80

Note:

Lower 16 bits of the address.

Port 6 Data Direction Register (P6DDR): P6DDR is an 8-bit write-only register that can select

input or output for each pin in port 6.

Bit

Initial value

Read/Write

—

P6 DDR

—

P6 DDR

Port 6 data direction 5 to 3, 0

These bits select input or output for port 6 pins

Reserved bits

Bits 7, 6, 2, and 1 are reserved.

P6DDR is a write-only register. Its value cannot be read. All bits return 1 when read.

P6DDR is initialized to H'80 by a reset and in hardware standby mode. In software standby mode

it retains its previous setting. If a P6DDR bit is set to 1, the corresponding pin maintains its output

state in software standby mode.

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