M37207MF datasheet(28/122 Pages) RENESAS

28 / 122 page

MITSUBISHI MICROCOMPUTERS

M37207MF-XXXSP/FP, M37207M8-XXXSP

M37207EFSP/FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER

and ON-SCREEN DISPLAY CONTROLLER

Fig. 20. Serial I/O Mode Register

Fig. 21. Serial I/O Control Register

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O mode register (SM) [Address 00DE16]

Name

Functions

After reset RW

Serial I/O Mode Register

0, 1 Internal synchronous

clock selection bits

(SM0, SM1)

(See note 1)

b1 b0

0 0: f(XIN)/4 or f(XCIN)/4

0 1: f(XIN)/16 or f(XCIN)/16

1 0: f(XIN)/32 or f(XCIN)/32

1 1: f(XIN)/64 or f(XCIN)/64

Synchronous clock

selection bit (SM2)

3, 7 Ports P40, P41

function selection

bits (SM3, SM7)

P40/SOUT2/

SDA3/XCIN

P40

SOUT2

SDA3

0: External clock

1: Internal clock

4, 6 Ports P42, P43

function selection bits

(SM4, SM6)

Transfer direction

selection bit (SM5)

0: LSB first

1: MSB first

0R W

P41/SCLK2/

SCL3/XCOUT

P41

SCLK2

SCL3

P42/SIN2/

SDA2/AD8

P42

SDA2

P42

SDA2

0R W

P43/SRDY2/

SCL2/AD7

P43

SRDY2

SDA2

Notes 1: Either f(XIN) or f(XCIN) is selected by bit 7 of the CPU

mode register.

2: When using ports P4 0–P43 as serial I/O pins, set bit 1 of

the serial control register to “1.”

(See note 2)

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O control register (SIC) [Address 0207 16]

Name

Functions

After reset RW

Serial I/O Control Register

Input signal to sift

(SIC0)

CSIO b0

0 0: Input signal from S IN1

0 1: Input signal from S OUT1

(See note 1)

1 0: Input signal from S IN2

1 1: Input signal from S OUT2

(See note 1)

Serial I/O pin switch

bit (CSIO)

0: SOUT1,SCLK1, SIN1, SRDY1

1: SOUT2,SCLK2, SIN2, SRDY2

Notes 1: When inputting data from the S out pin, set “FF16” to the serial

I/O register.

2: When using ports P4 4–P47 as serial I/O pins, set bit 1 of the

serial I/O control register to “0.”

3, 7 Ports P47 function

selection bits

(SM3, SM7)

(See note 2)

P47/SRDY1/PWM8

P47

SRDY1

PWM8

0R W

4, 5 Ports P44, P45

function selection bits

(SM4, SM6)

(See note 2)

Ports P46 function

selection bits

(SIC6)

(See note 2)

P44/SOUT1/

SDA1

P44

SOUT1

SDA1

0R W

P45/SCLK1/

SCL1

P45

SCLK1

SCL1

P46/SIN1/PWM9

P46

PWM9

0R W

I2C-BUS connection

ports switch bit

(SIC2)

0: SDA2, SCL2, SDA1, SCL1

1: SDA3, SCL3

0R W

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