AM1705 Datasheet, PDF (75/155 Pages) Texas Instruments – AM1705 ARM Microprocessor

AM1705
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6.14.3 MMC/SD Electrical Data/Timing
SPRS657 – FEBRUARY 2010
No.
1
2
3
4
t_{su(CMDV-CLKH)}
t_h(CLKH-CMDV)
t_{su(DATV-CLKH)}
t_h(CLKH-DATV)
Table 6-29. Timing Requirements for MMC/SD Module
(see Figure 6-22 and Figure 6-24)
PARAMETER
MIN
Setup time, MMCSD_CMD valid before MMCSD_CLK high
3.2
Hold time, MMCSD_CMD valid after MMCSD_CLK high
1.5
Setup time, MMCSD_DATx valid before MMCSD_CLK high
3.2
Hold time, MMCSD_DATx valid after MMCSD_CLK high
1.5
MAX
UNIT
ns
ns
ns
ns
Table 6-30. Switching Characteristics Over Recommended Operating Conditions for MMC/SD Module
(see Figure 6-21 through Figure 6-24)
No.
7 f_(CLK)
8 f_{(CLK_ID)}
9 t_W(CLKL)
10 t_W(CLKH)
11 t_r(CLK)
12 t_f(CLK)
13 t_d(CLKL-CMD)
14 t_d(CLKL-DAT)
PARAMETER
Operating frequency, MMCSD_CLK
Identification mode frequency, MMCSD_CLK
Pulse width, MMCSD_CLK low
Pulse width, MMCSD_CLK high
Rise time, MMCSD_CLK
Fall time, MMCSD_CLK
Delay time, MMCSD_CLK low to MMCSD_CMD transition
Delay time, MMCSD_CLK low to MMCSD_DATx transition
MIN
MAX UNIT
0
52
MHz
0
400
KHz
6.5
ns
6.5
ns
3
ns
3
ns
-4.5
2.5
ns
-4.5
2
ns
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Peripheral Information and Electrical Specifications
75
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