R01UH0823EJ0100 Rev.1.00
Page 1423 of 1823
Jul 31, 2019
RX23W Group
40. SD Host Interface (SDHIa)
40.2.2
The SDARG register is used for setting the argument field value. Set the SDARG register before setting the SDCMD
register. The argument field value of the automatically issued CMD12 is 0000 0000h regardless of the SDARG register
value.
40.2.3
Note 1. Do not rewrite this bit when the SDSTS2.CBSY flag is 1.
The SDSTOP register stops data transfer. During a multi-block transfer sequence, the SDBLKCNT register value
(number of blocks to be transferred) can be set to valid or invalid by setting the SDSTOP register.
When setting the STP bit to 1, set it after the SDSTS1.RSPEND flag becomes 1; when setting the STP bit to 0, set it after
the SDSTS1.ACEND flag becomes 1. After a command sequence is complete, the SDHI does not issue CMD12 and the
SDSTS1.ACEND flag does not become 1 even if the STP bit is set to 1. When the SDHI is in the busy state after
receiving the R1b response, the SDHI does not issue CMD12 even if the STP bit is 1, and after the SDHI is released from
SDARG
Address(es): SDHI.SDARG 0008 AC08h
b31 b30 b29 b28 b27 b26 b25 b24 b23 b22 b21 b20 b19 b18 b17 b16 b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SDSTOP
Address(es): SDSTOP 0008 AC10h
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
—
—
—
—
—
—
—
SDBLKCNTEN
Value after reset:
0
0
0
0
0
0
0
0
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
STP
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b0
Transfer Stop
Data transfer stops when this bit is set to 1.
R/W
b7 to b1
—
Reserved
These bits are 0 when read and cannot be modified.
R
b8
SDBLKCNTEN Block Count Register Value Select
0: SDBLKCNT register value is invalid
1: SDBLKCNT register value is valid
R/W
b31 to b9
—
Reserved
These bits are 0 when read and cannot be modified.
R