mcf5249 Freescale Semiconductor, Inc, mcf5249 Datasheet - Page 204

• Manufacturer Part Number: mcf5249
• Description: Coldfire Integrated Microprocessor
• Manufacturer: Freescale Semiconductor, Inc

shift_busy2
DATA lines
bitcounter2
CMD line
Note 1: If driveCmdMask = 0x40000, CMD line is driven P after receiving card response
Note 2: If driveDataMask = 0x80000, DATA lines are driven P after receiving CMD response.
Note 3:To stop host driving P on cmd or data lines, write FLASHMEDIACMD2 with driveDataMask or driveCmdMask 0
Note 4: Host interface will stop SCLK_OUT clock when needed to prevent transmit underrun or receive overrun. (not shown)
write
FLASHMEDIACMD2 =
0x60000 +
cmdBitCount +
driveCmdMask +
driveDataMask
If driveCmdMask = 0, CMD line is not driven (Z) after receiving card response
If driveDataMask = 0, DATA lines are not driven (Z) after receiving CMD response.
Z
Z
S
write one or more
times to
FLASHMEDIADATA2
Freescale Semiconductor, Inc.
cmdBitCount
Host command
For More Information On This Product,
Go to: www.freescale.com
E
Z
Z
P P
P
write
FLASHMEDIACMD2 =
rspBitCount +
driveCmdMask +
driveDataMask
S
Card driving bus
rspBitCount
Card Response
read one or more
times from
FLASHMEDIADATA2
E
Z
P Z P Z P Z P Z Z
P Z P Z P Z P Z Z
note 1
note 2
write
FLASHMEDIACMD2 = 0