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MB90335 Series
18.3
UART Pins
The pin of UART is shown.
■ UART Pins
The UART pins also serve as general-purpose ports. Table 18.3-1 shows the functions of pins, input-output
formats, and settings in using UART, etc.
Table 18.3-1 UART Pins
Pin Name
Pin Function
Port 4 I/O /
P42/SIN0,
serial data
P45/SIN1
input
Port 4 I/O /
P43/SOT0,
serial data
P46/SOT1
output
Port 4 I/O /
P44/SCK0,
serial clock
P47/SCK1
input/output
CM44-10137-6E
Pull-up
I/O Type
Selection
CMOS output/
CMOS
None
hysteresis
input
FUJITSU MICROELECTRONICS LIMITED
Stand-by
Setting for the use of the pin
Control
Set to the input port
(DDR4: bit2=0)
(DDR4: bit5=0)
Set to output enable.
(SMR0, SMR1: SOE=1)
Yes
Set to the input port at clock input.
(DDR4: bit4=0)
(DDR4: bit7=0)
Set to output enable at clock output.
(SMR0, SMR1: SCKE=1)
CHAPTER 18 UART
18.3 UART Pins
391
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