FUJITSU MB91460 SERIES FR60 - Manual (Page 636)

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Chapter 32 USART (LIN / FIFO)
3.USART Pins
3. USART Pins
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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