beautypg.com

Usart pins – FUJITSU MB91460 SERIES FR60 User Manual

Page 636

background image

620

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