Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1457 of 1823
Jul 31, 2019
RX23W Group 40. SD Host Interface (SDHIa)
Figure 40.11 Issuing the Single Block Write Command
Clear the flag register
Set the SDCLKCR register.
SDSIZE = Transfer data size
SDIMSK1 = 0000 FFFEh
SDIMSK2 = 0000 7F80h
Response end or
error occurred?
SDSTS1 = 0000 FFFEh Clear the flags.
SDARG = Argument field value
SDCMD = 0000 0018h
CMD24 (single
block write) issued
Error (communication error or timeout)
Read the SDRSP10 register Check the response.
SDIMSK1 = 0000 FFFBh
SDIMSK2 = 0000 7D80h
Enable the access end interrupt
Enable the BWE interrupt
Is the BWE flag 1 or
did an error occur?
SDSTS2 = 0000 FDFFh Clear the flags.
Write the amount of data set in the
SDSIZE.LEN[9:0] bits from the SDBUFR
register
Write data.
Access end?
SDSTS1 = 0000 FFFBh Clear the flags.
Error processing
(clear the interrupt flags)
No
Yes
No
Yes
No
Yes
Start
End
Error (communication error or timeout)

Renesas RX Series Specifications

General

Core	RXv1, RXv2, RXv3
Flash Memory	Up to 8 MB
RAM	Up to 1 MB
Operating Voltage	1.62V to 5.5V
Operating Temperature	-40°C to +85°C or +105°C
Package	BGA, LQFP
ADC Resolution	12-bit
DAC Resolution	12-bit
Communication Interfaces	SCI, SPI, I2C, USB, Ethernet, CAN
Architecture	32-bit
Security Features	Memory Protection Unit (MPU)