Table of Contents
Advertisement
11.2.7 Serial Status Register (SSR)
SSR is an 8-bit register containing multiprocessor bit values, and status flags that indicate the SCI
operating status.
Bit
TDRE
Initial value
Read/Write
R/(W)
Transmit data register empty
Status flag indicating that transmit data has been transferred from TDR into
TSR and new data can be written in TDR
Note: * Only 0 can be written to clear the flag.
7
6
RDRF
ORER
1
0
R/(W)
R/(W)
*
*
Overrun error
Status flag indicating detection of a receive overrun error
Receive data register full
Status flag indicating that data has been received and stored in RDR
5
4
FER
PER
0
0
R/(W)
R/(W)
*
*
Parity error
Status flag indicating detection of
a receive parity error
Framing error
Status flag indicating detection of a receive
framing error
3
2
TEND
MPB
0
1
R
*
Multiprocessor bit
Stores the received
multiprocessor bit value
Transmit end
Status flag indicating end of
transmission
1
0
MPBT
0
0
R
R/W
Multiprocessor
bit transfer
Value of multi-
processor bit to
be transmitted
337
Advertisement
Table of Contents
