SH7708 datasheet(383/633 Pages) RENESAS

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Table 13.9

Serial Mode Register Settings and SCI Communication Formats

SCSMR Settings

SCI Communication Format

Mode

Bit 7

Bit 6

CHR

Bit 5

Bit 2

Bit 3

STOP

Data

Length

Parity

Bit

Multipro-

cessor Bit

Stop Bit

Length

Asynchronous

0000

8-bit

Not used Not used

1 bit

2 bits

Used

1 bit

2 bits

7-bit

Not used

1 bit

2 bits

Used

1 bit

2 bits

Asynchronous

8-bit

Not used Used

1 bit

(multiprocessor

2 bits

format)

7-bit

1 bit

2 bits

Synchronous

****

8-bit

Not used

None

Note:

Asterisks (*) indicate don’t-care bits.

Table 13.10 SCSMR and SCSCR Settings and SCI Clock Source Selection

SCSMR

SCSCR Settings

SCI Transmit/Receive Clock

Mode

Bit 7

Bit 1

CKE1

Bit 0

CKE0

Clock

Source

SCK

Pin Function

Asynchronous

Internal

SCI does not use the SCK pin

mode

Outputs a clock with frequency

matching the bit rate

External

Inputs a clock with frequency 16

times the bit rate

Synchronous

Internal

Outputs the serial clock

mode

External

Inputs the serial clock

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