SH7018 datasheet(304/431 Pages) RENESAS

304 / 431 page

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14.3.3

Port B IO Register (PBIOR)

The port B IO register (PBIOR) is a 16-bit readable/writable register that selects the input/output

direction of the pins in port B. The bits of this register correspond to the various pins. PBIOR is

enabled when the port B pins function as general input/output (PB9 to PB0) pins, and disabled

otherwise.

When the port B pins function as PB9 to PB0, a pin becomes an output when the corresponding bit

in PBIOR is set to 1, and an input when the bit is cleared to 0.

PBIOR is initialized to H'0000 by an external power-on reset. However, it is not initialized by a

WDT reset, in standby mode, or in sleep mode. In these cases it retains its previous data.

Bit:

—

PB9IOR

PB8IOR

Initial value:

R/W:

R/W

Bit:

PB7IOR

PB6IOR

PB5IOR

PB4IOR

PB3IOR

PB2IOR

PB1IOR

PB0IOR

Initial value:

R/W:

R/W

14.3.4

Port B Control Registers 1 and 2 (PVCR1, PBCR2)

Port B control registers 1 and 2 (PVCR1, PBCR2) are 16-bit readable/writable registers that select

the functions of the pins in port B.

PVCR1 and PBCR2 are each initialized to H'0000 by an external power-on reset. However, they

are not initialized by a WDT reset, in standby mode, or in sleep mode. In these cases they retain

their previous data.

SH7018 Datasheet(PDF) 304 Page - Renesas Technology Corp