SH7014 datasheet(486/754 Pages) RENESAS

486 / 754 page

16. Pin Function Controller (PFC)

Rev.5.00 Sep. 27, 2007 Page 452 of 716

REJ09B0398-0500

Bit 0

⎯PA0 Mode (PA0MD): Selects the function of the PA0/RxD0 pin.

Bit 0

PA0MD

Description

General input/output (PA0)

(initial value)

Receive data input (RxD0)

16.3.3

Port B I/O Register (PBIOR)

Bit:

⎯

PB9

IOR

PB8

IOR

Initial value:

R/W:

R/W

Bit:

PB7

IOR

PB6

IOR

PB5

IOR

PB4

IOR

PB3

IOR

PB2

IOR

PB1

IOR

PB0

IOR

Initial value:

R/W:

R/W

R/W*

Note:

R only in the SH7014.

The port B I/O register L (PBIOR) is a 16-bit read/write register that selects input or output for the

ten pins of port B (eight pins in the SH7014). Bits PB9IOR to PB0IOR correspond to the

PB9/

IRQ7/A21 pin to PB0/A16 pin. PBIOR is enabled when the port B pins function as

input/outputs (PB9 to PB0). For other functions, it is disabled.

For port B pin functions PB9 to PB0, a given pin in port B is an output pin if its corresponding

PBIOR bit is set to 1, and an input pin if the bit is cleared to 0.

PBIOR is initialized to H'0000 by external power-on reset; however, it is not initialized for reset

by WDT, standby mode, or sleep mode, so the previous data is maintained.

The settings of bits 1 and 0 of PBIOR are functional only in the SH7016 and SH7017. In the

SH7014, there are no pins corresponding to these bits; they are always read as 0, and their write

value should always be 0.

SH7014 Datasheet(PDF) 486 Page - Renesas Technology Corp

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