R01UH0823EJ0100 Rev.1.00
Page 1442 of 1823
Jul 31, 2019
RX23W Group
40. SD Host Interface (SDHIa)
40.2.17 SDIO Status Register (SDIOSTS)
Note 1. The flag value does not change even when set to 1. If 0 is written to this flag, it becomes 0.
The SDIOSTS register indicates the status of the SDIO card access. When clearing a flag, bits to be cleared should be set
to 0; bits not being cleared should be set to 1.
IOIRQ Flag (SDIO Interrupt Status Flag)
—
This flag becomes 1 under the following condition:
The SDIO interrupt from the SDIO card is accepted while the SDIOMD.INTEN bit is 1.
—
This flag becomes 0 under the following condition:
Note 1.
Access the SDIO card, negate the SDIO interrupt from the SDIO card, and then set the IOIRQ flag to 0. If the
SDIO interrupt from the SDIO card is not negated, the IOIRQ flag might become 1 again.
EXPUB52 Flag (EXPUB52 Status Flag)
—
This flag becomes 1 under any of the following conditions:
When multi-block transfer is triggered by CMD53 being issued, the SDIOMD.C52PUB bit is set to 1 while the last
block is being transferred.
When multi-block write is triggered by CMD53 being issued, the SDIOMD.C52PUB bit remains set to 1 while the
last block is being transferred.
—
This flag becomes 0 under the following condition:
The flag is set to 0.
SDIOSTS
Address(es): SDHI.SDIOSTS 0008 AC6Ch
b31
b30
b29
b28
b27
b26
b25
b24
—
—
—
—
—
—
—
—
Value after reset:
0
0
0
0
0
0
0
0
b23
b22
b21
b20
b19
b18
b17
b16
—
—
—
—
—
—
—
—
Value after reset:
0
0
0
0
0
0
0
0
b15
b14
b13
b12
b11
b10
b9
b8
EXWT
EXPUB52
—
—
—
—
—
—
Value after reset:
0
0
0
0
0
0
0
0
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
IOIRQ
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b0
SDIO Interrupt Status Flag
0: SDIO interrupt not accepted
1: SDIO interrupt accepted
R/(W)
b2, b1
—
Reserved
These bits are undefined when read. Set them to 1 when writing.
R/W
b13 to b3
—
Reserved
These bits are 0 when read and cannot be modified.
R
b14
EXPUB52 EXPUB52 Status Flag
Indicates the status of the EXPUB52
R/(W)
b15
EXWT Status Flag
Indicates the status of the EXWT
R/(W)
b31 to b16
—
Reserved
These bits are 0 when read and cannot be modified.
R