sdmmc_csd_v1_t Struct Reference

CSD register structure Version 1.0. More...

Detailed Description

CSD register structure Version 1.0.

See also

Physical Layer Simplified Specification Version 9.00, Section 5.3.2, Table 5.4 [sdcard.org]

Definition at line 638 of file sdmmc.h.

#include <sdmmc.h>

Data Fields
uint32_t	CSD_CRC:8
	CRC including End bit 1b [7:0].
uint32_t	reserved5:1
	reserved [8]
uint32_t	WP_UPC:1
	write protection until power cycle [9]
uint32_t	FILE_FORMAT:2
	File format [11:10].
uint32_t	TMP_WRITE_PROTECT:1
	temporary write protection [12]
uint32_t	PERM_WRITE_PROTECT:1
	permanent write protection [13]
uint32_t	COPY:1
	copy flag [14]
uint32_t	FILE_FORMAT_GRP:1
	File format group [15].
uint32_t	reserved4:5
	reserved [20:16]
uint32_t	WRITE_BL_PARTIAL:1
	partial blocks for write allowed [21]
uint32_t	WRITE_BL_LEN:4
	max. More...
uint32_t	R2W_FACTOR:3
	write speed factor [28:26]
uint32_t	reserved3:2
	reserved [30:29]
uint32_t	WP_GRP_ENABLE:1
	write protect group enable [31]
uint32_t	WP_GRP_SIZE:7
	write protect group size [38:32]
uint32_t	SECTOR_SIZE:7
	erase sector size [45:39]
uint32_t	ERASE_BLK_EN:1
	erase single block enable [46]
uint32_t	C_SIZE_MULT:3
	device size multiplier [49:47]
uint32_t	VDD_W_CURR_MAX:3
	max. More...
uint32_t	VDD_W_CURR_MIN:3
	max. More...
uint32_t	VDD_R_CURR_MAX:3
	max. More...
uint32_t	VDD_R_CURR_MIN:3
	max. More...
uint32_t	C_SIZE:12
	device size [73:62]
uint32_t	reserved2:2
	reserved [75:74]
uint32_t	DSR_IMP:1
	DSR implemented [76].
uint32_t	READ_BLK_MISALIGN:1
	read block misalignment [77]
uint32_t	WRITE_BLK_MISALIGN:1
	write block misalignment [78]
uint32_t	READ_BL_PARTIAL:1
	partial blocks for read allowed [79]
uint32_t	READ_BL_LEN:4
	max. More...
uint32_t	CCC:12
	card command classes [95:84]
uint32_t	TRAN_SPEED:8
	max. More...
uint32_t	NSAC:8
	data read access-time-2 in CLK cycles [111:104]
uint32_t	TAAC:8
	data read access-time-1 [119:112]
uint32_t	reserved1:6
	reserved [125:120]
uint32_t	CSD_STRUCTURE:2
	CSD structure [127:126].

Field Documentation

READ_BL_LEN

uint32_t sdmmc_csd_v1_t::READ_BL_LEN

max.

read data block length [83:80]

Definition at line 667 of file sdmmc.h.

TRAN_SPEED

uint32_t sdmmc_csd_v1_t::TRAN_SPEED

max.

data transfer rate [103:96]

Definition at line 669 of file sdmmc.h.

VDD_R_CURR_MAX

uint32_t sdmmc_csd_v1_t::VDD_R_CURR_MAX

max.

read current VDD max [58:56]

Definition at line 659 of file sdmmc.h.

VDD_R_CURR_MIN

uint32_t sdmmc_csd_v1_t::VDD_R_CURR_MIN

max.

read current VDD min [61:59]

Definition at line 660 of file sdmmc.h.

VDD_W_CURR_MAX

uint32_t sdmmc_csd_v1_t::VDD_W_CURR_MAX

max.

write current VDD max [52:50]

Definition at line 657 of file sdmmc.h.

VDD_W_CURR_MIN

uint32_t sdmmc_csd_v1_t::VDD_W_CURR_MIN

max.

write current VDD min [55:53]

Definition at line 658 of file sdmmc.h.

WRITE_BL_LEN

uint32_t sdmmc_csd_v1_t::WRITE_BL_LEN

max.

write data block length [25:22]

Definition at line 649 of file sdmmc.h.

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The documentation for this struct was generated from the following file:

• drivers/include/sdmmc/sdmmc.h