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Chapter 11 Serial Interface 0, 1

XI - 54

Operation

11-3-6

Serial interface 0 UART Serial Interface Pin Setup

Serial Interface 0 Pin Setup (1, 2 channels, at transmission)

Table 11-3-25 shows the pins setup at UART serial interface 0 transmission. The pins setup is common

to the TXD0 pin, RXD0 pin, regardless of those pins are independent / connected.

Serial Interface 0 Pin Setup (2 channels, at reception)

Table 11-3-26 shows the pins setup at UART serial interface 0 reception with 2 channels (TXD0 pin,

RXD0 pin).

Table 11-3-26 UART Serial Interface 0 Pin Setup (2 channels, at reception)

Table 11-3-25 UART Serial Interface 0 Pin Setup (1, 2 channels, at transmission)

Data output pin

Data input pin

TXD0A pin/

RXD0A pin/

TXD0B pin

RXD0B pin

Port Pin

P03/P70

P04/P71

Serial data output

"1" input

SC0MD1(SC0SBOS)

SC0MD1(SC0SBIS)

Push-pull /

Nch open-drain

SC0ODC (SC0ODC0)

SC0ODC (SC0ODC2)

Output mode

P0DIR (P0DIR3)

P7DIR (P7DIR0)

Add/Not Add

P0PLU (P0PLU3)

P7PLUD(P7PLUD0)

Style

Setup item

Port Pin Setup

TXD / RXD pin Setup

Function

SC0ODC (SC0SEL)

Select used pin (A, B)

TXD0/RXD0 pin independent/connection

SC0MD1 (SC0IOM)

Note) Select pull-up/down resistor with P7RDOWN flag of FLOAT register (x'03F2E')

[ Chapter4, 4.7.2 Register ]

I/O

Pull-up (Pull-down) setup