Table of Contents
Advertisement
20.3
UART2, UART3 Pins
This section describes the UART2, UART3 pins and provides a pin block diagram.
■ UART2, UART3 Pins
The UART2, UART3 pins also serve as general ports. Table 20.3-1 lists the UART2, UART3 pins.
Table 20.3-1 UART2, UART3 Pins
Pin name
Pin function
Port I/O or serial
P90/SIN2
data input
Port I/O or serial
P91/SCK2
clock input/output
Port I/O or serial
P92/SOT2
data output
Port I/O or serial
P93/SIN3
data input
Port I/O or serial
P95/SOT3
data output
Port I/O or serial
P94/SCK3
clock input/output
See "Electrical characteristics 3. Direct current standard" for the standard values.
I/O format
CMOS output
and selectable
Automotive/
Not selectable
CMOS
Hysteresis input
Standby
Pull-up
control
Provided
CHAPTER 20 UART2, UART3
Setting required to use pin
Set as an input port
(DDR9:bit0 = 0)
Set as an input port when a
clock is input
(DDR9:bit1 = 0)
Set to output enable mode
when a clock is output
(SMR2:SCKE = 1)
Set to output enable mode
(SMR2:SOE = 1)
Set as an input port
(DDR9: bit3 = 0)
Set to output enable mode
(SMR3: SOE = 1)
Set as an input port when a
clock is input
(DDR9: bit4 = 0)
Set to output enable mode
when a clock is output
(SMR3: SCKE = 1)
347
Advertisement
Table of Contents
