r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1497

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

34.3.2
SSISR is configured by status flags that indicate the operating status of the SSI module and bits
that indicate the current channel number and word number.
Initial value:
Initial value:
Bit
31 to 29
28
R/W:
R/W:
Bit:
Bit:
Status Register (SSISR)
Bit Name

DMRQ
31
15



R
R
1



30
14
R
R
0

29


13
R
R
1
Initial
Value

0
DMRQ UIRQ

28
12
R
R
0
0
R/W*
R/W
R
R
27
11

R
0
0
1
OIRQ
R/W*
26
10

0
R
0
Description
Reserved
These bits are always read as an undefined value. The
write value should always be 0.
DMA Request Status Flag
This status flag allows the CPU to see the status of the
DMA request of SSI module.
TRMD = 0 (Receive Mode):
•
•
TRMD = 1 (Transmit Mode):
•
•
1
IIRQ

25
R
0
R
9
0
If DMRQ = 1 then SSIRDR has unread data.
If SSIRDR is read then DMRQ = 0 until there is new
unread data.
If DMRQ = 1, SSITDR requests data to be written to
continue the transmission onto the audio serial bus.
Once data is written to SSITDR then DMRQ = 0
until further transmit data is requested.
DIRQ

24
R
0
R
8
0
23


R
R
0
7
0
Rev. 1.00 Oct. 01, 2007 Page 1431 of 1956
22


0
R
R
6
0
Section 34 Serial Sound Interface (SSI)
21


R
R
0
5
0
20


R
4
R
1
0
19
CHNO[1:0]

R
0
R
3
0
REJ09B0256-0100
18

R
0
R
2
0
SWNO
17

R
R
0
1
1
IDST
16

R
R
0
1
0