S3C2416X RISC MICROPROCESSOR
HSMMC CONTROLLER
20-5
4.3 SD CLOCK STOP SEQUENCE
START
Set SD Clock OFF
END
(1)
Stop SD Clock
Figure 20-4. SD Clock Stop Sequence
The flow chart for stopping the SD Clock is shown in Figure 20-4. The Host Driver shall not stop the SD Clock
when a SD transaction is occurring on the SD Bus -- namely, when either Command Inhibit (DAT) or Command
Inhibit (CMD) in the Present State register is set to 1.
(1) Set SD Clock Enable(ENSDCLK) in the Clock Control register to 0. Then, the Host Controller stops supplying
the SD Clock.
4.4 SD CLOCK FREQUENCY CHANGE SEQUENCE
START
SD Clock Stop
SD Clock Supply
END
(1)
(2)
Figure 20-5. SD Clock Change Sequence
The sequence for changing SD Clock frequency is shown in Figure 20-5. When SD Clock is still off, step (1) is
omitted.
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 ...