Fujitsu FR60 Manual

A SERVICE OF

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Chapter 32 USART (LIN / FIFO)

3.USART Pins

3. USART Pins

■ USART Pins

The USART pins also serve as general ports. Table 3-1 lists the pin functions, I/O formats, and settings

required to use USART.

Figure 3-1 Block Diagram of USART pins

Table 3-1 USART04 Pins

Pin name Pin function I/O format

Pull-up

Pull-down

Standby

control

Setting required to use

pin

SIN04

Port I/O or serial

data input

CMOS output and

CMOS hystere-

sis, CMOS Auto-

motive hysteresis,

TTL input

Program-

mable

Provided

Set port function mode:

PFR: bit0 = 1,

EPFR: bit0 = 0

SOT04

Port I/O or serial

data output

Set to output enable mode:

SMR04: SOE = 1,

Set port function mode:

PFR: bit1 = 1

EPFR: bit1 = 0

SCK04

Port I/O or serial

clock input/output

Set port function mode:

PFR: bit2 = 1

EPFR: bit2 = 0

Set to output enable mode

when a clock is output

SMR04: SCKE = 1

PDR

PFR

DDR

Peripheral output

Peripheral input

PDR read

Port Bus

Pin