HD6433713 datasheet(192/324 Pages) RENESAS

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Bit 2: Pin P92/SI1 function switch (SI1)

Bit 2 selects whether pin P92/SI1 functions as a P92 input/output pin or as the SI1 output pin.

Bit 2

SI1

Description

Pin P92/SI1 functions as P92 I/O pin.

(initial value)

Pin P92/SI1 functions as SI1 output pin. Setting bit SCK1 to 1 and

clearing bit SO1 to 0 puts SCI1 in receive mode.

Bit 1: Pin P91/SCK1 function switch (SCK1)

Bit 1 selects whether pin P91/SCK1 functions as a P91 input/output pin or as the SCK1

input/output pin.

Bit 1

SCK1

Description

Pin P91/SCK1 functions as P91 I/O pin.

(initial value)

Pin P91/SCK1 functions as SCK1 I/O pin. The direction of clock

I/O and the prescaler divider ratio are set in serial mode register 1 (SMR1).

10.2.6 Port Mode Register 3 (PMR3)

PMR3 is an 8-bit read/write register, for enabling the PMOS transistors of SCI1 and SCI2 data

output pins (pins SO1 and SO2), and for controlling SCI2 chip select output (pin SI2/CS).

Upon reset, PMR3 is initialized to H'97.

Bit 3 is explained here. For bits 6 and 5, see 11.2.5, Port Mode Register 3 (PMR3).

Bit 3: Pin SO1 PMOS on/off (SO1PMOS)

Bit 3 enables or disables the PMOS buffer transistor of pin P93/SO1.

Bit 3

S01PMOS

Description

The PMOS transistor of pin P93/SO1 is enabled: CMOS output.

(initial value)

The PMOS transistor of pin P93/SO1 is disabled: NMOS open-drain output.

Bit

Initial value

Read/Write

—

R/W

—

R/W

—

SO2

PMOS

SO1

PMOS

181

HD6433713 Datasheet(PDF) 192 Page - Renesas Technology Corp

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