UPD17062 datasheet(101/298 Pages) RENESAS

101 / 298 page

µPD17062

10.5.3

Presettable Shift Register

Fig. 10.6 shows the functions of the presettable shift register.

The presettable shift register writes the serial interface serial out data and reads the serial interface serial

in data.

Fig. 10-6

Relationship between Presettable Shift Register and Data Buffer

Serial interface serial data is output while being shifted sequentially the data from the MSB (bit b7) of the

presettable shift register.

During serial data input, data is shifted sequentially from the LSB (bit b0).

DBF3

0CH

DBF2

0DH

DBF1

0EH

DBF0

0FH

b15 b14 b13 b12

b11 b10

SIO0SFR

03H

Serial out data write and serial in data read

234

MSB

LSB

Data output timing

×D7 ×D6 ×D5 ×D4 ×D3 ×D2 ×D1 ×D0

234

MSB

LSB

Data input timing

×D7 ×D6 ×D5 ×D4 ×D3 ×D2 ×D1 ×D0

Symbol

Peripheral

address

Peripheral hardware

Name

Peripheral register

Name

Data buffer

Symbol

Address

Bit

Data

Don't care

Transfer data

GET

PUT

Valid data

Presettable

shift register

Serial interface

Serial out data

Clock

Serial in data

Clock

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