Description of the data path
STINGRAY Technical Manual
V4.4.2
187
008h
RECEIVE_BUFFER_
STATUS_CONTRL
RBUF_ST
[0..7]
SIO receive buffer status
RD: Number of bytes pending in receive
buffer
WR: Ignored
RBUF_CNT
[8..15]
SIO receive buffer control
RD: Number of bytes to be read from the
receive FIFO
WR: Number of bytes left for readout
from the receive FIFO
---
[16..31] Reserved
00Ch
TRANSMIT_BUFFER_
STATUS_CONTRL
TBUF_ST
[0..7]
SIO output buffer status
RD: Space left in TX buffer
WR: Ignored
TBUF_CNT
[8..15]
SIO output buffer control
RD: Number of bytes written to transmit
FIFO
WR: Number of bytes to transmit
---
[16..31] Reserved
010h
..
0FFh
---
Reserved
100h
SIO_DATA_REGISTER
CHAR_0
[0..7]
Character_0
RD: Read character from receive buffer
WR: Write character to transmit buffer
SIO_DATA_REGISTER
CHAR_1
[8..15]
Character_1
RD: Read character from receive
1
WR: Write character to transmit
1
SIO_DATA_REGISTER
CHAR_2
[16..23] Character_2
RD: Read character from receive
2
WR: Write character to transmit
2
SIO_DATA_REGISTER
CHAR_3
[24..31] Character_3
RD: Read character from receive
3
WR: Write character to transmit
3
104h
..
1FFH
SIO_DATA_REGISTER_
ALIAS
[0..31]
Alias SIO_Data_Register area for block
transfer
Offset
Name
Field
Bit
Description
Table 58: Serial input/output control and status register (SIO CSR)