TMP89FS60 datasheet(134/410 Pages) TOSHIBA

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Page 120

8. I/O Ports

8.4 Serial Interface Selecting Function

TMP89FS60

RA005

8.4

Serial Interface Selecting Function

On the TMP89FS60, the built-in serial interface (SIO, UART and I2C) communication pins and interrupt source

assignment can be changed. Two out of three functions, SIO0, UART0 and I2C0, can be used at the same time by

using this selecting function. One of two functions, SIO1 and UART1, can be used.

The input pins of the 16-bit timer counter A0 input (TCA0 input) can be changed by using this selecting function.

Figure 8-12 Serial Interface Selecting Function

Note 1: The operation for changing SERSEL must be executed while the applicable serial interface and timer counter operations

are stopped. If SERSEL is switched during operation of these peripheral functions, each peripheral function may receive

(transmit) unexpected data and operate improperly.

Serial interface selection control register

SERSEL

(0x0FCB)

76543

210

Bit Symbol

TCA0SEL

SRSEL1

SRSEL0

Read/Write

R/W

After reset

00000

000

TCA0SEL

16-bit timer counter A0 input switch-

ing

00:

01:

10:

11:

P72 input (TCA0)

P21 input (also used as RXD0)

P91 input (also used as RXD1)

P94 input (also used as RXD2)

SRSEL1

Serial interface selection 1

00:

01:

10:

11:

Select UART1

Select SIO1

Reserved

SRSEL0

Serial interface selection 0

00:

01:

10:

11:

Select UART0, I2C0

Select UART0, SIO0

Select SIO0, I2C0

Reserved

UART1

SIO1

P90 (TXD1 / SO1)

P91 (RXD1 / SI1)

P92 (SCLK1)

SERSEL<SRSEL1>

Selector

UART0

SIO0

I2C0

TCA0

P20 (TXD0 / SO0)

P21 (RXD0 / SI0)

P22 (SCLK0)

SERSEL<SRSEL0>

SERSEL<TCA0SEL>

Selector

P23 (SDA0 / SO0)

P24 (SCL0 / SI0)

P25 (SCLK0)

P72 (TCA0)

P94 (RXD2)

P21 (RXD0)

P91 (RXD1)

Selector

Port

TMP89FS60 Datasheet(PDF) 134 Page - Toshiba Semiconductor

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