mcf5249 Freescale Semiconductor, Inc, mcf5249 Datasheet - Page 206
mcf5249
Manufacturer Part Number
mcf5249
Description
Coldfire Integrated Microprocessor
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MCF5249.pdf
(454 pages)
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bitcounter1
write
FLASHMEDIACMD1 =
0x40000 +
wideShiftMask
shift_busy1
DATA lines
interrupt1
Note 1: For 4-bit wide bus, wideShiftMask is 0x400000, CRC length is 64 bits
Note 2: If read data packet followed by another read data packet (block read), set
Note 3: Host interface will stop SCLK_OUT clock when needed to prevent transmit underrun or receive overrun. (not shown)
readDataMask = 0x40000. If only one read data packet, set readDataMask = 0.
P P
For 1-bit wide bus, wideShiftMask = 0, CRC length is 16 bits.
P P P
write
FLASHMEDIACMD1 =
0x260000 +
dataBitCount +
wideShiftMask
Freescale Semiconductor, Inc.
S
For More Information On This Product,
Host driving bus
Data
Go to: www.freescale.com
dataBitCount
write one or more
times to
FLASHMEDIADATA1
CRC
E
write
FLASHMEDIACMD1 =
0x000003 +
Z Z S crc status E
Card driving bus
read
FLASHMEDIA-
DATA1
(get CRC status)
Card signals busy
S
write
FLASHMEDIACMD1=
0
L .. L
Check
interrupt1 in
FLASHMEDIASTATUS
write
FLASHMEDIACMD1=
0x80000
E
Z
Z
Host driving
bus
P
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