CM120 C-Media Electronics, Inc., CM120 Datasheet - Page 30

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CM120

Manufacturer Part Number
CM120
Description
Usb 7-in-1 Combo Card Reader Controller
Manufacturer
C-Media Electronics, Inc.
Datasheet

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Date: 09/09/2003
5.4 CompactFlash Timing
Note: Worst case duty cycle restricted to 45/55.
Data Delay after IORD
Data Hold following IORD
IORD width Time
Address Setup before IORD
Address Hold following IORD
CE Setup before IORD
CE Hold following IORD
IOIS16 Delay Falling from Address
IOIS16 Delay Rising from Address
Note:The maximum load on –IOIS16 is 1 LSTTL with 50pF total load. All times are in nanoseconds.
CLK frequency
CLK period
CLK output jitter
CLK high pulsewidth (note 1)
CLK low pulse width (note 1)
Minimum time from –WAIT high to –IORD high is 0 nsec, but minimum –IORD width must still
be met. Dout signifies data provided by the CompactFlash Storage Card or CF+ Card to the
system.
Parameter
Item
Figure 25: True IDE Mode I/O Read Timing Diagram
Table 9:True IDE Mode I/O Input (Read) Timing
td(IORD)
th(IORD)
tw(IORD)
tsuA(IORD)
thA(IORD)
tsuCE(IORD)
thCE(IORD)
tdfIOIS16(ADR) tAVISL
tdrIOIS16(ADR) tAVISH
Table 8:
Tclk_period
- 29 -
Symbol
Tclk_high
Tclk_low
Symbol
USB 7-in-1 Combo Card Reader Controller
Clocks
tIGLQV
tIGLQX
tIGLIGH
tAVIGL
tIGHAX
tELIGL
tIGHEH
IEEE Symbol
Min
36
36
-
-
-
41.5
41.5
Typ
12
83
-
Min ns.
Max
750
165
45
45
70
20
20
0
5
-
-
Version: 1.3
CM120
Units
MHz
ns
ps
ns
ns
Max ns.
100
35
35

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