HD6473887 Datasheet, PDF (452/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

SSR32—Serial status register 32
H'AC
SCI32
Bit
Initial value
Read/Write
7
6
5
TDRE32 RDRF32 OER32
1
0
0
R/(W)^* R/(W)^* R/(W)^*
4
FER32
0
R/(W)^*
3
2
1
0
PER32 TEND32 MPBR32 MPBT32
0
1
R/(W)^*
R
0
0
R
R/W
Multiprocessor bit transfer
0 A 0 multiprocessor bit is transmitted
1 A 1 multiprocessor bit is transmitted
Multiprocessor bit receive
0 Data in which the multiprocessor bit is 0 has been received
1 Data in which the multiprocessor bit is 1 has been received
Transmit end
0 Transmission in progress
[Clearing conditions] • After reading TDRE32 = 1, cleared by writing 0 to TDRE32
• When data is written to TDR32 by an instruction
1 Transmission ended
[Setting conditions] • When bit TE in serial control register 32 (SCR32) is cleared to 0
• When bit TDRE32 is set to 1 when the last bit of a transmit character is sent
Parity error
0 Reception in progress or completed normally
[Clearing conditions] After reading PER32 = 1, cleared by writing 0 to PER32
1 A parity error has occurred during reception
[Setting conditions] When the number of 1 bits in the receive data plus parity bit does not match the parity
designated by the parity mode bit (PM32) in the serial mode register (SMR32)
Framing error
0 Reception in progress or completed normally
[Clearing conditions] After reading FER32 = 1, cleared by writing 0 to FER32
1 A framing error has occurred during reception
[Setting conditions] When the stop bit at the end of the receive data is checked for a value of 1 at completion of
reception, and the stop bit is 0
Overrun error
0 Reception in progress or completed
[Clearing conditions] After reading OER32 = 1, cleared by writing 0 to OER32
1 An overrun error has occurred during reception
[Setting conditions] When the next serial reception is completed with RDRF32 set to 1
Receive data register full
0 There is no receive data in RDR32
[Clearing conditions] • After reading RDRF32 = 1, cleared by writing 0 to RDRF32
• When RDR32 data is read by an instruction
1 There is receive data in RDR32
[Setting conditions] When reception ends normally and receive data is transferred from RSR32 to RDR32
Transmit data register empty
0 Transmit data written in TDR32 has not been transferred to TSR32
[Clearing conditions] • After reading TDRE32 = 1, cleared by writing 0 to TDRE32
• When data is written to TDR32 by an instruction
1 Transmit data has not been written to TDR32, or transmit data written in TDR32 has been transferred to TSR32
[Setting conditions] • When bit TE32 in serial control register 32 (SCR32) is cleared to 0
• When data is transferred from TDR32 to TSR32
Note: * Only a write of 0 for flag clearing is possible.
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