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HSMMC CONTROLLER
S3C2416X RISC MICROPROCESSOR
20-28
The Response Field indicates bit positions of “Responses” defined in the PHYSICAL LAYER SPECIFICATION
Version 1.01. The Table (upper) shows that most responses with a length of 48 (R[47:0]) have 32 bits of the
response data (R[39:8]) stored in the
Response
register at REP[31:0]. Responses of type R1b (Auto CMD12
responses) have response data bits R[39:8] stored in the
Response
register at REP[127:96]. Responses with
length 136 (R[135:0]) have 120 bits of the response data (R[127:8]) stored in the
Response
register at
REP[119:0].
To be able to read the response status efficiently, the Host Controller only stores part of the response data in the
Response
register. This enables the Host Driver to efficiently read 32 bits of response data in one read cycle on a
32-bit bus system. Parts of the response, the Index field and the CRC, are checked by the Host Controller (as
specified by the
Command Index Check Enable
and the
Command CRC Check Enable
bits in the
Command
register) and generate an error interrupt if an error is detected. The bit range for the CRC check depends on the
response length. If the response length is 48, the Host Controller shall check R[47:1], and if the response length is
136 the Host Controller shall check R[119:1].
Since the Host Controller may have a multiple block data DAT line transfer executing concurrently with a
CMD_wo_DAT command, the Host Controller stores the Auto CMD12 response in the upper bits (REP[127:96]) of
the
Response
register. The CMD_wo_DAT response is stored in REP[31:0]. This allows the Host Controller to
avoid overwriting the Auto CMD12 response with the CMD_wo_DAT and vice versa.
When the Host Controller modifies part of the
Response
register, as shown in the Table above, it shall preserve
the unmodified bits.
NOTE:
CMD_wo_DAT (Command without Data line) means the command not to use data line. The command set of this type
depends on the card type (MMC, SD/SDIO or CE-ATA). Generally, the command using data line receives contents
through “Buffer Data Port Register”, but the command without using data line receives contents through “RESPONSE
register” in the Host Controller.
Содержание S3C2416
Страница 33: ...S3C2416X RISC MICROPROCESSOR PRODUCT OVERVIEW 1 5 3 BLOCK DIAGRAM Figure 1 1 S3C2416X Block Diagram ...
Страница 38: ...PRODUCT OVERVIEW S3C2416X RISC MICROPROCESSOR 1 10 153 AIN 1 U14 195 EINT 10 GPG2 K15 237 SDATA 14 C18 ...
Страница 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Страница 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Страница 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Страница 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Страница 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Страница 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Страница 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Страница 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Страница 455: ...S3C2416X RISC MICROPROCESSOR HSMMC CONTROLLER 20 9 4 9 SD COMMAND ISSUE SEQUENCE Figure 20 9 Timeout Setting Sequence ...
Страница 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Страница 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Страница 653: ...S3C2416X RISC MICROPROCESSOR ELECTRICAL DATA 26 15 Figure 26 14 SDRAM READ WRITE Timing Trp 2 Trcd 2 Tcl 2 DW 16 bit ...
Страница 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...
Страница 672: ...MECHANICAL DATA S3C2416X RISC MICROPROCESSOR 30 2 Figure 27 2 330 FBGA 1414 Package Dimension 2 Bottom View ...