Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1463 of 1823
Jul 31, 2019
RX23W Group 40. SD Host Interface (SDHIa)
40.3.6.8 IO_RW_EXTENDED Command (CMD53 (Multi-Block Read))
Figure 40.15 shows an example of issuing the IO_RW_EXTENDED command (CMD53/Multi-block read).
Figure 40.15 Issuing the IO_RW_EXTENDED Command (CMD53/Multi-Block Read)
Clear the flag register
SDCLKCR = SDHI clock
SDSIZE = 0000 0200h
SDIMSK1 = 0000 FFFEh
SDIMSK2 = 0000 7F80h
SDSTOP = 0000 0100h
SDBLKCNT = Number of transfer blocks
SDIOMD = 0000 0001h
SDIOIMSK = 0000 3FFEh
Did a response end
or error occur?
SDSTS1 = 0000 FFFEh Clear the flags.
SDARG = Argument field value
SDCMD = 0000 7C35h
CMD53 (multi-block
read) issued
Error (communication error or timeout)
Read the SDRSP10 register Check the response.
SDIMSK1 = 0000 FFFBh
SDIMSK2 = 0000 7E80h
Enable the access end interrupt
Enable the BRE interrupt
Is the BRE flag 1 or
did an error occur?
SDSTS2 = 0000 FEFFh Clear the flags.
Read data from the SDBUFR register
(transfer data size set in the SDSIZE register)
Read data.
Did an access end
or error occur?
SDSTS1 = 0000 FFFBh
Clear the flags.
Error processing
(clear the interrupt flags)
A
Has the number
of blocks set in the SDBLKCNT register
been read?
No
Yes
B
From C52PUB
From IOABT
No
Yes
No
Yes
No
Yes
Start
End
Error (communication error or
timeout)
Error (communication error or timeout)

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English