Uart/Sio Serial Status And Data Register (Ssr0) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 20 UART/SIO
20.5.3

UART/SIO Serial Status and Data Register (SSR0)

The UART/SIO serial status and data register (SSR0) indicates the transmission/
reception status and error status of the UART/SIO.
UART/SIO Serial Status and Data Register (SSR0)
Figure 20.5-4 UART/SIO Serial Status and Data Register (SSR0)
Address
0058 SSR0
H
R/W: Readable/writable (Read value is the same as write value)
R0/WX: Undefined bit (Read value is "0", writting has no effect on operation)
R(RM1), W: Readable/writable (Read value is different from write value,
"1" is read by read-modfy-write instruction)
R/WX: Read only (Readable, writting has no effect on operation)
: Initial value
338
bit7 bit6 bit5 bit4
- - PER OVE FER RDRF TCPL
R/WX R/WX
R0/WX R0/WX
TDRE
0 Transmit data present
1 Transmit data absent
TCPL
0 Cleared by writing "0"
1 Serial transmission complete
RDRF
0 Receive data absent
1 Receive data present
FER
0 Framing error absent
1 Framing error present
OVE
0 Overrun error absent
1 Overrun error present
PER
0 Parity error absent
1 Parity error present
bit3 bit2 bit1 bit0
TDRE
R/WX R/WX
R/WX
R(RM1), W
Transmission data register empty
Transmission completion flag
Reception data register full
Framing error flag
Overrun error flag
Parity error flag
Initial value
00000001
B