SD/MMC CONTROLLER
S5PC100 USER’S MANUAL (REV1.0)
8.12-32
9.6 COMMAND REGISTER
Command Register
•
CMDREG0, R/W, Address = 0xED80_000E
•
CMDREG1, R/W, Address = 0xED90_000E
•
CMDREG2, R/W, Address = 0xEDA0_000E
This register contains the SD Command Argument.
The Host Driver checks the Command Inhibit (DAT) bit and Command Inhibit (CMD) bit in the Present State
register before writing to this register. Writing to the upper byte of this register triggers SD command generation.
The Host Driver is responsible to write this register because the Host Controller does not protect the writing if
Command Inhibit (CMD) is set.
CMDREG
Bit
Description
Reset Value
Reserved [15:14]
Reserved
CMDIDX [13:8]
Command
Index
These bits are set to the command number (CMD0-63, ACMD0-63) that
is specified in bits 45-40 of the Command-Format in the SD Memory
Card Physical Layer Specification and SDIO Card Specification.
CMDTYP [7:6]
Command
Type
There are three types of special commands: Suspend, Resume and
Abort.
These bits are set to 00b for all other commands.
•
Suspend Command
If the Suspend command succeeds, the Host Controller assumes that
the SD Bus has been released and it is possible to issue the next
command, which uses the
DAT
line. The Host Controller de-asserts
Read Wait for read transactions and stops checking busy for write
transactions. The interrupt cycle starts, in 4-bit mode. If the Suspend
command fails, the Host Controller maintains its current state, and the
Host Driver restarts the transfer by setting Continue Request in the
Block Gap Control
register.
•
Resume Command
The Host Driver re-starts the data transfer by restoring the registers in
the range of 000-00Dh (Refer to Suspend and Resume mechanism).
The Host Controller checks for busy before starting write transfers.
•
Abort Command
If this command is set when executing a read transfer, the Host
Controller stops reads to the buffer. If this command is set while
executing a write transfer, the Host Controller stops driving the
DAT
line.
After issuing the Abort command, the Host Driver must issue a software
reset (Refer to Abort Transaction).
11b = Abort CMD12, CMD52 for writing "I/O Abort" in CCCR
10b = Resume CMD52 for writing "Function Select" in CCCR
01b = Suspend CMD52 for writing "Bus Suspend" in CCCR
00b = Normal Other commands
Summary of Contents for S5PC100
Page 21: ...MEMORY MAP S5PC100 USER S MANUAL REV1 0 1 2 2 ...
Page 34: ...S5PC100 USER S MANUAL REV1 0 BALL MAP SIZE POP 1 1 9 1 4 MCP CONNECTION ...
Page 49: ...IROM CODE S5PC100 USER S MANUAL REV1 0 2 6 4 12 Mhz 300 0 Mhz 100 0 Mhz 79 5 Mhz 20 6 Mhz ...
Page 174: ...CLOCK CONTROLLER S5PC100 USER S MANUAL REV1 0 2 3 24 Rs 0ohm Rf 1Mohm CL 10 35pF ...
Page 322: ...CORESIGHT S5PC100 USER S MANUAL REV1 0 3 2 4 Figure 3 2 2 S5PC100 Coresight Structure ...
Page 330: ...CORESIGHT S5PC100 USER S MANUAL REV1 0 3 2 12 Figure 3 2 7 ETB Block Diagram ...
Page 345: ...S5PC100 USER S MANUAL REV1 0 ASYNC BRIDGE 3 4 3 Figure 3 4 2 Asynchronous Bridge Components ...
Page 359: ...S5PC100 USER S MANUAL REV1 0 VECTORED INTERRUPT CONTROLLER 4 1 3 Figure 4 1 2 VIC Daisy Chain ...
Page 651: ...S5PC100 USER S MANUAL REV1 0 UART 8 1 27 Figure 8 1 10 UINTSP UINTP and UINTM block diagram ...
Page 652: ...UART S5PC100 USER S MANUAL REV1 0 8 1 28 NOTES ...
Page 743: ...S5PC100 USER S MANUAL REV1 0 MIPI HSI INTERFACE CONTROLLER 8 6 13 ...
Page 756: ...MIPI HSI INTERFACE CONTROLLER S5PC100 USER S MANUAL REV1 0 8 6 26 NOTES ...
Page 800: ...MIPI CSIS S5PC100 USER S MANUAL REV1 0 8 8 10 NOTES ...
Page 816: ...USB HOST CONTROLLER S5PC100 USER S MANUAL REV1 0 8 9 16 ...
Page 935: ...S5PC100 USER S MANUAL REV1 0 MODEM INTERFACE 8 11 13 NOTES ...
Page 1111: ...S5PC100 USER S MANUAL REV1 0 IMAGE ROTATOR 9 2 3 3 4 180 DEGREE ROTATION ...
Page 1112: ...IMAGE ROTATOR S5PC100 USER S MANUAL REV1 0 9 2 4 3 5 90 AND 270 DEGREE ROTATION ...
Page 1118: ...S5PC100 USER S MANUAL REV1 0 CAMERA INTERFACE 9 3 3 Figure 9 3 2 Camera Interface Overview ...
Page 1181: ...JPEG S5PC100 USER S MANUAL REV1 0 9 4 6 Figure 9 4 5 YCbCr4 2 2 Color Format ...
Page 1199: ...JPEG S5PC100 USER S MANUAL REV1 0 9 4 24 NOTES ...
Page 1245: ...3D ACCELERATOR S5PC100 USER S MANUAL REV1 0 9 6 18 ...
Page 1353: ...TVOUT VIDEO DAC S5PC100 USER S MANUAL REV1 0 9 7 32 ...
Page 1452: ...S5PC100 USER S MANUAL REV1 0 VIDEO PROCESSOR 9 8 43 NOTES ...
Page 1482: ...MIXER S5PC100 USER S MANUAL REV1 0 9 9 30 NOTES ...
Page 1664: ...S5PC100 USER S MANUAL REV1 0 I2S CONTROLLER 5 1CH 10 2 31 NOTES ...
Page 1701: ...AC97 CONTROLLER S5PC100 USER S MANUAL REV1 0 10 4 18 NOTES ...
Page 1731: ...SPDIF TRANSMITTER S5PC100 USER S MANUAL REV1 0 10 6 16 NOTES ...
Page 1744: ...S5PC100 USER S MANUAL REV1 0 ADC AND TOUCH SCREEN INTERFACE 10 7 13 NOTES ...
Page 1750: ...KEYPAD INTERFACE S5PC100 USER S MANUAL REV1 0 10 8 6 Figure 10 8 7 Keypad I F Block Diagram ...
Page 1755: ...S5PC100 USER S MANUAL REV1 0 KEYPAD INTERFACE 10 8 11 NOTES ...
Page 1779: ...SECURE DOMAIN MANAGER S5PC100 USER S MANUAL REV1 0 11 2 22 NOTES ...