Pin Of Uart; Fig. 12.2 Block Diagram Of Pins Of Uart; Table 12-4 Uart Pins - Fujitsu MB90420/5 (A) Series Hardware Manual

MB90420/5 (A) SERIES F

12.3 Pin of UART

The function of the UART pins and a block diagram are shown.
n Pin UART
The pins of UART also serve as general-purpose port pins. Table 12-4 shows the function of the pins, I/O
type, and settings required for using the UART.
Pin Name Pin Function
P00/SIN0
Port0 I/O,
(P03/SIN1)
serial-data input
P01/SOT0
Port0 I/O,
(P04/SOT1)
serial-data output
P02/SCK0
Port0 I/O,
(P05/SCK1)
serial-clock I/O
n Block diagram of pins of UART
PDR (port data register)
PDR read
PDR write
DDR (port direction register)
DDR write
DDR read
Standby control: The stop or timer mode is enabled and SPL is 1.
*: The resource input/output pins are the only pins with the resource.
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL

Table 12-4 UART Pins

I/O Type
CMOS output,
CMOS hysteresis
input
Resource input*
Output latch
Direction latch

Fig. 12.2 Block Diagram of Pins of UART

Pull-up Standby
Selection Control
Not
Provided
provided
Resource output*
Resource output enable*
12-8
Setting Required
to Use Pins
Set to the input port
(DDR0: bit 0 = 0)
(DDR0: bit 3 = 0)
Set to output enabled
(SMR: SOE = 1)
Set to the input port at clock
input
(DDR0: bit 2 = 0)
(DD0: bit 5 = 0)
Set to output enabled at clock
output
(SMR: SCKE = 1)
P00/SIN0
Pch
P01/SOT0
P02/SCK0
P03/SIN1
Nch P04/SOT1
P05/SCK1
Standby control (SPL = 1)
Pin