HSMMC CONTROLLER
S3C2416X RISC MICROPROCESSOR
20-8
4.7 TIMEOUT SETTING FOR DAT LINE
Calculate a Divisor for detecting Timeout
(1)
START
Set Timeout Detection Timer
(2)
END
Figure 20-8. Timeout Setting Sequence
In order to detect timeout errors on DAT line, the Host Driver shall execute the following two steps before any SD
transaction.
(1) Calculate a divisor to detect timeout errors by reading Timeout Clock Frequency and Timeout Clock Unit in
the Capabilities register. If Timeout Clock Frequency is 00 0000b, the Host System shall provide this
information to the Host Driver by another method.
(2) Set Data Timeout Counter Value(TIMEOUTCON) in the Timeout Control register in accordance with the value
from step (1) above.
4.8 SD TRANSACTION GENERATION
This section describes the sequences how to generate and control various kinds of SD transactions. SD
transactions are classified into three cases:
(1) Transactions that do not use the DAT line.
(2) Transactions that use the DAT line only for the busy signal.
(3) Transactions that use the DAT line for transferring data.
In this specification the first and the second case’s transactions are classified as “Transaction Control without
Data Transfer using DAT Line,” the third case’s transaction is classified as “Transaction Control with Data
Transfer using DAT Line.”
Please refer to the specifications below for the detailed specifications on the SD Command itself:
•
SD Memory Card Specification Part 1
PHYSICAL LAYER SPECIFICATION Version 1.01
•
SD Card Specification PART E1
Secure Digital Input/Output (SDIO) Specification Version 1.00
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...