M38748M7T-FS 查看數據表（PDF） - Mitsumi

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M38748M7T-FS

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

MITSUBISHI MICROCOMPUTERS

3874 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Automatic transfer RAM

(before transfer)

Automatic transfer data pointer

1516

Transfer counter

0D16

MSB

LSB

21516 0 0 1 1 0 1 0 1

21416

–

–

1

0

1

0

1

SOUT3

1

LSB first

Transmit bit string

Start bit

1 0 1 0 11 0 0110101

Odd bit

Automatic transfer RAM

(after transfer)

Receive bit string

Start bit

MSB

LSB

1 0 1 0 0 1 1 001 0110

SIN3 21516

Odd bit

LSB first

21416

10010110

1 0 1 0 01 ––

SCLK3

(Internal synchronous

clock selected)

SOUT3

SIN3

*according to automatic

transfer interval setting

Serial transfer status flag

Transfer counter

D16 C16 B16 A16 9 8 7 6

5

4 32 1 0

Transfer counter write

Automatic transfer

data pointer

1516

1416

Automatic transfer RAM

Serial I/O3 register

Serial I/O3 register

Automatic transfer RAM

* When using the SSTB3 output signal, this become 2 transfer clock cycles longer than the set

interval.

Fig. 39 Arbitrary bit serial I/O operation

45

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