adsp-bf548 Analog Devices, Inc., adsp-bf548 Datasheet - Page 67

• Manufacturer Part Number: adsp-bf548
• Description: Blackfin Embedded Processor
• Manufacturer: Analog Devices, Inc.

SD/SDIO Controller Timing
Table 45
Table 46
speed) timing.
Table 45. SD/SDIO Controller Timing
1
Parameter
Timing Requirements
t
t
Switching Characteristics
f
f
t
t
t
t
t
t
0 kHz means to stop the clock. The given minimum frequency range is for cases where a continuous clock is required.
ISU
IH
PP
OD
WL
WH
TLH
THL
ODLY
ODLY
Input Setup Time
Input Hold Time
Clock Frequency Data Transfer Mode
Clock Frequency Identification Mode
Clock Low Time
Clock High Time
Clock Rise Time
Clock Fall Time
Output Delay Time During Data Transfer Mode
Output Delay Time During Identification Mode
and
and
Figure 36
Figure 37
1 Input includes SD_Dx and SD_CMD
2 Output includes SD_Dx and SD_CMD
SD_CLK
OUTPUT
INPUT
describe SD/SDIO Controller Timing.
describe SD/SDIO controller (high
VOH
(MIN)
ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
VOL
(MAX)
1
2
t THL
Rev. A | Page 67 of 88 | October 2008
Figure 36. SD/SDIO Controller Timing
t ODLY(MAX)
t WL
t ISU
t TLH
t PP
t IH
t WH
Min
7.2
2
0
0
15
15
–1
–1
t ODLY(MIN)
1
kHz/100 kHz
Max
20
400
10
10
14
50
Unit
ns
ns
MHz
kHz
ns
ns
ns
ns
ns
ns