hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 397

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Bit 7: Transmit data register empty (TDRE)
Bit 7 indicates that transmit data has been transferred from TDR to TSR.
Bit 7
TDRE
0
1
Bit 6: Receive data register full (RDRF)
Bit 6 indicates that received data is stored in RDR.
Bit 6
RDRF
0
1
Note: If an error is detected in the receive data, or if the RE bit in SCR3 has been cleared to 0,
RDR and bit RDRF are not affected and retain their previous state.
Note that if data reception is completed while bit RDRF is still set to 1, an overrun error
(OER) will result and the receive data will be lost.
Description
Transmit data written in TDR has not been transferred to TSR
Clearing conditions:
After reading TDRE = 1, cleared by writing 0 to TDRE
When data is written to TDR by an instruction
Transmit data has not been written to TDR, or transmit data written in
TDR has been transferred to TSR
Setting conditions:
When bit TE in SCR3 is cleared to 0
When data is transferred from TDR to TSR
There is no receive data in RDR
Clearing conditions:
After reading RDRF = 1, cleared by writing 0 to RDRF
When RDR data is read by an instruction
There is receive data in RDR
Setting condition:
When reception ends normally and receive data is transferred from RSR to RDR
Description
Section 10 Serial Communication Interface
Rev. 6.00 Aug 04, 2006 page 361 of 680
REJ09B0145-0600
(initial value)
(initial value)