Nut/OS  5.0.5
API Reference
Data Fields
_MMC_CSD Struct Reference
Multimedia Card Driver

Multimedia card identification register. More...

#include <lpc177x_8x_mmcard_sdio.h>

Collaboration diagram for _MMC_CSD:
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Data Fields

u_char mmcsd_spec
 Card specification.
u_char mmcsd_taac
 Data read access time.
u_char mmcsd_nsac
 Data read access time 2.
u_char mmcsd_speed
 Maximum data transfer rate.
u_char mmcsd_ccc_bl [2]
 Card command classes and max. read block length.
u_char mmcsd_rfld [8]
 Read-only fields.
u_char mmcsd_pfld
 Programmable field.
u_char mmcsd_crc
 Checksum.
uint8_t mmcsd_spec
 Card specification.
uint8_t mmcsd_taac
 Data read access time.
uint8_t mmcsd_nsac
 Data read access time 2.
uint8_t mmcsd_speed
 Maximum data transfer rate.
uint8_t mmcsd_ccc_bl [2]
 Card command classes and max. read block length.
uint8_t mmcsd_rfld [8]
 Read-only fields.
uint8_t mmcsd_pfld
 Programmable field.
uint8_t mmcsd_crc
 Checksum.

Detailed Description

Multimedia card identification register.

Field Documentation

uint8_t _MMC_CSD::mmcsd_spec

Card specification.

uint8_t _MMC_CSD::mmcsd_taac

Data read access time.

uint8_t _MMC_CSD::mmcsd_nsac

Data read access time 2.

uint8_t _MMC_CSD::mmcsd_speed

Maximum data transfer rate.

uint8_t _MMC_CSD::mmcsd_ccc_bl[2]

Card command classes and max. read block length.

uint8_t _MMC_CSD::mmcsd_rfld[8]

Read-only fields.

  • [0] 0..1 Device size bits 10..11.
  • [0] 2..3 Reserved.
  • [0] 4 DSR implemented.
  • [0] 5 Read block misalignment.
  • [0] 6 Write block misalignment.
  • [0] 7 Partial blocks for read allowed.
  • [1] 0..7 Device size bits 2..9.
  • [2] 0..2 Max. read current at VDD max.
  • [2] 3..5 Max. read current at VDD min.
  • [2] 6..7 Device size bits 0..1.
  • [3] 0..1 Device size multiplier bits 1..2.
  • [3] 2..4 Max. write current at VDD max.
  • [3] 5..7 Max. write current at VDD min.
  • [4] 0..1 Erase group size multiplier bits 3..4.
  • [4] 2..6 Erase group size.
  • [4] 7 Device size multiplier bit 0.
  • [5] 0..4 Write protect group size.
  • [5] 5..7 Erase group size multiplier bits 0..2.
  • [6] 0..1 Max. write data block length bits 2..3.
  • [6] 2..4 Read to write speed factor.
  • [6] 5..6 Reserved.
  • [6] 7 Write protect group enable.
  • [7] 0 Content protection application.
  • [7] 1..4 Reserved.
  • [7] 5 Partial blocks for write allowed.
  • [7] 6..7 Max. write data block length bits 0..1.
uint8_t _MMC_CSD::mmcsd_pfld

Programmable field.

uint8_t _MMC_CSD::mmcsd_crc

Checksum.

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