DM3725CBC datasheet(260/280 Pages) TI

260 / 280 page

SWPS038-097

mmcx_clk

mmcx_cmd

mmcx_dat[n:0]

HSSD5

HSSD6

HSSD1

HSSD2

DM3730, DM3725

SPRS685D

– AUGUST 2010 – REVISED JULY 2011

www.ti.com

Figure 6-74. MMC2 and MMC3 Interfaces

—High-Speed SDIO Mode—Data/Command Transmit(1)

(1) In mmcx, x = 2 or 3. In mmcx_dat[n:0], n is equal to 3 for mmc2 and 7 for mmc3.

6.6.8.1.8 MMC2 and MMC3 Interfaces

—Standard SDIO Mode

Table 6-131 and Table 6-132 assume testing over the recommended operating conditions and electrical

characteristic conditions below (see Figure 5-89 and Figure 5-90).

Table 6-130. MMC2 and MMC3 Interfaces Timing Conditions

—Standard SDIO Mode

TIMING CONDITION PARAMETER

VALUE

UNIT

Input Conditions

Input signal rise time

Input signal fall time

Output Condition

CLOAD

Output load capacitance(1)

(1) Buffer strength configuration: SPEEDCTRL = 1

Table 6-131. MMC2 and MMC3 Interfaces Timing Requirements

—Standard SDIO Mode(2)(3)

NO.

PARAMETER

OPP100

OPP50

UNIT

MIN

MAX

MIN

MAX

MMC2 and MMC3 Interface (1.8-V IO)

SD3

tsu(CMDV-CLKIH)

Setup time, mmcx_cmd valid before

3.3

21.9

mmcx_clk rising clock edge

SD4

th(CLKIH-CMDIV)

Hold time, mmcx_cmd valid after mmcx_clk

18.1

36.7

rising clock edge

SD7

tsu(DATxV-CLKIH)

Setup time, mmcx_dat[n:0](1) valid before

3.3

21.9

mmcx_clk rising clock edge

SD8

th(CLKIH-DATxIV)

Hold time, mmcx_dat[n:0](1) valid after

18.1

36.7

mmcx_clk rising clock edge

(1) In mmcx_dat[n:0], n is equal to 3 for MMC2 and 7 for MMC3.

(2) See Section 4.3.4, Processor Clocks.

(3) In mmcx, x is equal to 2 or 3.

Table 6-132. MMC2 and MMC3 Interfaces Switching Characteristics

—Standard SDIO Mode(6)(7)

NO.

PARAMETER

OPP100

OPP50

UNIT

MIN

MAX

MIN

MAX

Standard SDIO Mode

SD1

tc(clk)

Frequency(1), output clock period

MHz

SD2

tW(clkH)

Typical pulse duration, output clock high

X(4) *

PO(2)

SD2

tW(clkL)

Typical pulse duration, output clock low

Y(5) *

PO(2)

tdc(clk)

Duty cycle error, output clock

2083.33

4166.67

260

Timing Requirements and Switching Characteristics

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