HD6473887 Datasheet, PDF(446/523 Page) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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HD6473887 Datasheet, PDF (446/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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SCSR1âSerial control status register 1

Bit

Initial value

Read/Write

7

6

5

4

â

SOL ORER â

1

0

0

1

â

R/W R/(W)* â

H'A1

SCI1

3

2

1

0

â

â

MTRF STF

1

1

0

0

â

â

R

R/W

Start flag

0 Read

Write

1 Read

Write

Transfer operation stopped

Invalid

Transfer operation in progress

Starts transfer operation

Tail mark transmission flag

0 Idle state, or 8-bit/16-bit data transfer in progress

1 Tail mark transmission in progress

Overrun error flag

0 Clearing conditions:

After reading ORER = 1, cleared by writing 0 to ORER

1 Setting conditions:

When an external clock is used and the clock is input

after transfer is completed

Extension data bit

0 Read SO1 pin output level is low

Write Changes SO1 pin output to low level

1 Read SO1 pin output level is high

Write Changes SO1 pin output to high level

Note: * Only a write of 0 for flag clearing is possible.

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