mpc8309 Freescale Semiconductor, Inc, mpc8309 Datasheet - Page 41

• Manufacturer Part Number: mpc8309
• Description: Powerquicc Ii Pro Integrated Communications Processor Family Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Figure 30
Figure 31
Freescale Semiconductor
At recommended operating conditions with OV
Input hold times: SD_CMD, SD_DATx, SD_CD to
SD_CLK
Output delay time: SD_CLK to SD_CMD, SD_DATx valid
Notes:
1. The symbols used for timing specifications herein follow the pattern of t
2. In full-speed mode, the clock freqency value can be 0–25 MHz for an SD/SDIO card and 0–20 MHz for an MMC card. In
3. To satisfy hold timing, the delay difference between clock input and cmd/data input must not exceed 2 ns.
4. C
(reference)(state)
symbolizes eSDHC high-speed mode device timing (SHS) clock reference (K) going to the high (H) state, with respect to the
output (O) reaching the invalid state (X) or output hold time. Note that in general, the clock reference symbol is based on five
letters representing the clock of a particular functional. For rise and fall times, the latter convention is used with the
appropriate letter: R (rise) or F (fall).
high-speed mode, the clock freqency value can be 0–33.25 MHz for an SD/SDIO card and 0–52 MHz for an MMC card.
CARD
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0
Figure 31. eSDHC Data and Command Input/Output Timing Diagram Referenced to Clock
 10 pF, (1 card), and C
provides the eSDHC clock input timing diagram.
provides the data and command input/output timing diagram.
External Clock
operational mode
SD_DAT/CMD
SD_DAT/CMD
External Clock
for inputs and t
SD_CK
Outputs
eSDHC
Parameter
Inputs
Table 40. eSDHC AC Timing Specifications (continued)
VM
(first three letters of functional block)(reference)(state)(signal)(state)
L
= C
Figure 30. eSDHC Clock Input Timing Diagram
BUS
VM
DD
+ C
= 3.3 V
HOST
VM = Midpoint Voltage (OV
VM = Midpoint Voltage (OV
t
SHSCK
+ C
t
VM
SHSKHOV
t
VM
CARD
SHSIVKH
40 pF
t
Symbol
t
SHSKHOV
SHSIXKH
VM
VM
1
(first three letters of functional block)(signal)(state)
DD
DD
/2)
/2)
t
SHSIXKH
Min
t
2.5
–3
SHSCKL
t
SHSCKR
for outputs. For example, t
VM
Max
t
SHSCKH
—
3
t
SHSCKF
Unit
ns
ns
FHSKHOV
Notes
3, 4
eSDHC
4
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