參數(shù)資料
型號(hào): ST7920
廠商: Electronic Theatre Controls, Inc.
英文描述: ST7920
中文描述: ST7920
文件頁(yè)數(shù): 37/47頁(yè)
文件大小: 1685K
代理商: ST7920
ST7920
C2.0c
37/47
2001/10/18
AC Characteristics (T
A
= 25
o
C, V
DD
= 4.5V) Serial Mode Interface
Symbol
Characteristics
Test Condition
Min.
Typ.
Max.
Unit
Internal Clock Operation
f
OSC
OSC Frequency
R = 33K
470
530
590
KHz
External Clock Operation
f
EX
External Frequency
-
470
530
590
KHz
Duty Cycle
-
45
50
55
%
T
R
,T
F
Rise/Fall Time
-
-
-
0.2
μ
s
T
SCYC
T
SHW
T
SLW
T
SDS
T
SDH
T
CSS
T
CSH
Serial clock cycle
Pin E
400
-
-
ns
SCLK high pulse width Pin E
200
-
-
ns
SCLK low pulse width Pin E
200
-
-
ns
SID data setup time
Pins RW
40
-
-
ns
SID data hold time
Pins RW
40
-
-
ns
CS setup time
Pins RS
60
-
-
ns
CS hold time
Pins RS
60
-
-
ns
AC Characteristics (T
A
= 25
o
C, V
DD
= 2.7V) Serial Mode Interface
Symbol
Characteristics
Test Condition
Min.
Typ.
Max.
Unit
Internal Clock Operation
f
OSC
OSC Frequency
R = 18K
470
530
590
KHz
External Clock Operation
f
EX
External Frequency
-
470
530
590
KHz
Duty Cycle
-
45
50
55
%
T
R
,T
F
Rise/Fall Time
-
-
-
0.2
μ
s
T
SCYC
T
SHW
T
SLW
T
SDS
T
SDH
T
CSS
T
CSH
Serial clock cycle
Pin E
600
-
-
ns
SCLK high pulse width Pin E
300
-
-
ns
SCLK low pulse width Pin E
300
-
-
ns
SID data setup time
Pins RW
40
-
-
ns
SID data hold time
Pins RW
40
-
-
ns
CS setup time
Pins RS
60
-
-
ns
CS hold time
Pins RS
60
-
-
ns
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