CM120 C-Media Electronics, Inc., CM120 Datasheet - Page 33

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

Date: 09/09/2003
5.6 SmartMedia Timing
Clock high time
Clock rlse time
Clock fall time
Inputs CMD, DAT (referenced to CLK)
Input set-up time
Input hold time
Outputs CMD, DAT (Referenced to CLK)
Output Delay time
Clock CLK (All values are referred to min (V1H)and Max (V1L))
Clock frequency Data Transfer Mode
Clock frequency Identification Mode
(The
MultiMedia Card compatiblity).
Clock low time
Clock high time
Clock rise time
Clock fall time
Clock low time
5.6.1 AC Characteristics
Symbol
low
t
t
t
t
t
t
t
t
CLH
CLS
ALS
ALH
WP
CS
CH
DS
Parameter
freq.
CLE Set up Time
CLE Hold Time
-CE Set up Time
-CE Hold Time
-WE Pulse Width
ALE Set up Time
ALE Hold Time
Data Set up Time
Si
Table 12: SD/MMC Bus Timing, Parameter Value
require
Table 13：AC Characteristics
Parameter
for
Symbol
t
t
t
t
t
ODLY
t
t
t
f
t
t
f
TLH
THL
t
TLH
THL
WH
ISU
WN
OD
WL
WL
PP
IH
- 32 -
USB 7-in-1 Combo Card Reader Controller
Min
50
10
10
50
5
5
0
2
0
Max.
400
50
50
14
25
10
10
MHz
Unit
Min.
kHz
20
40
20
40
40
20
40
30
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CL ≤ 250 pF ( 21 cards )
CL ≤ 250 pF ( 21 cards )
CL ≤ 250 pF ( 21 cards )
CL ≤ 250 pF ( 21 cards )
CL ≤ 250 pF ( 21 cards )
CL ≤ 250 pF ( 1 cards )
CL ≤ 250 pF ( 1 cards )
CL ≤ 250 pF ( 1 cards )
CL ≤ 100 pF ( 7 cards )
CL ≤ 100 pF ( 7 cards )
CL ≤ 100 pF ( 7 cards )
CL ≤ 100 pF ( 7 cards )
CL ≤ 100 pF ( 7 cards )
Max.
-
-
-
-
-
-
-
-
Remark
Version: 1.3
Unit
CM120
ns
ns
ns
ns
ns
ns
ns
ns