SH7014 datasheet(686/754 Pages) RENESAS

686 / 754 page

Appendix A On-Chip Supporting Module Registers

Rev.5.00 Sep. 27, 2007 Page 652 of 716

REJ09B0398-0500

SCI

Bit

Name

Value

Description

Transmission is in progress

Clearing conditions:

•

When 0 is written to TDRE after reading TDRE = 1

•

When DMAC writes data in TDR

Transmit End (TEND)

End of transmission

(initial value)

Clearing conditions:

•

Power-on reset or standby mode

•

When the TE bit in SCR is 0

•

When TDRE = at transmission of the last bit of a

1-byte serial transmit character

Multiprocessor bit value in receive data is 0*

(initial value)

Multiprocessor Bit (MPB)

Multiprocessor bit value in receive data is 1

Multiprocessor bit value in transmit data is 0 (initial value)

Multiprocessor Bit Transfer

(MPBT)

Multiprocessor bit value in transmit data is 1

Notes:

1. The ORER flag is not affected and retains their previous values when the RE bit in SCR is cleared

to 0.

2. RDR continues to hold the data received before the overrun error, so subsequent receive data is

lost. Serial receiving cannot continue while ORER is set to 1. In the clock synchronous mode,

serial transmitting is disabled.

3. The FER flag is not affected and retains their previous values when the RE bit in SCR is cleared to

4. When the stop bit length is two bits, only the first bit is checked to see if it is a 1. The second stop

bit is not checked. When a framing error occurs, the SCI transfers the receive data into the RDR

but does not set RDRF. Serial receiving cannot continue while FER is set to 1. In the clock

synchronous mode, serial transmitting is also disabled. In addition, serial transmission cannot

continue in clock synchronous mode.

5. The PER flag is not affected and retains their previous values when the RE bit in SCR is cleared to

6. When a parity error occurs, the SCI transfers the receive data into the RDR but does not set

RDRF. Serial receiving cannot continue while PER is set to 1. In the clock synchronous mode,

serial transmitting is also disabled. In addition, serial transmission cannot continue in clock

synchronous mode.

7. If RE is cleared to 0 when a multiprocessor format is selected, the MPB retains its previous value.

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