AM1806_1005 Datasheet, PDF (119/241 Pages) Texas Instruments – AM1806 ARM Microprocessor

AM1806
www.ti.com
SPRS658B – FEBRUARY 2010 – REVISED MAY 2010
6.13.3 MMC/SD Electrical Data/Timing
Table 6-40 through Table 6-41 assume testing over recommended operating conditions.
Table 6-40. Timing Requirements for MMC/SD
(see Figure 6-25 and Figure 6-27)
NO.
PARAMETER
1 t_{su(CMDV-CLKH)} Setup time, MMCSD_CMD valid before MMCSD_CLK high
2 t_h(CLKH-CMDV) Hold time, MMCSD_CMD valid after MMCSD_CLK high
3 t_{su(DATV-CLKH)} Setup time, MMCSD_DATx valid before MMCSD_CLK high
4 t_h(CLKH-DATV) Hold time, MMCSD_DATx valid after MMCSD_CLK high
1.3V, 1.2V
MIN MAX
4
2.5
4.5
2.5
1.1V
MIN MAX
4
2.5
5
2.5
1.0V
MIN MAX
6
2.5
6
2.5
UNIT
ns
ns
ns
ns
Table 6-41. Switching Characteristics for MMC/SD (see Figure 6-24 through Figure 6-27)
NO.
PARAMETER
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)
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
1.3V, 1.2V
MIN MAX
0
52
0 400
6.5
6.5
3
3
-4 2.5
-4 3.3
1.1V
MIN MAX
0
50
0 400
6.5
6.5
3
3
-4
3
-4 3.5
1.0V
MIN MAX
0
25
0 400
10
10
10
10
-4
4
-4
4
UNIT
MHz
KHz
ns
ns
ns
ns
ns
ns
10
7
9
MMCSD_CLK
13
MMCSD_CMD
13
13
13
START
XMIT
Valid
Valid
Valid
END
Figure 6-24. MMC/SD Host Command Timing
MMCSD_CLK
MMCSD_CMD
9
7
10
START
XMIT
1
Valid
2
Valid
Valid
END
Figure 6-25. MMC/SD Card Response Timing
MMCSD_CLK
MMCSD_DATx
10
7
9
14
14
START
D0
D1
14
14
Dx
END
Figure 6-26. MMC/SD Host Write Timing
Copyright © 2010, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications 119
Submit Documentation Feedback
Product Folder Link(s): AM1806