參數(shù)資料
型號: HMS99C54S
廠商: Electronic Theatre Controls, Inc.
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS WITH EMBEDDED FLASH
中文描述: 8位單片機與嵌入式閃存微控制器
文件頁數(shù): 42/73頁
文件大?。?/td> 696K
代理商: HMS99C54S
HMS99C51S/52S/54S/56S/58S
38
Sep. 2004 Ver 1.01
Figure 9. AC Testing: Input, Output Waveforms
Figure 10. Float Waveforms
Figure 11. External Clock Cycle
AC Inputs during testing are driven at V
CC
0.5V for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made a V
IHmin
for a logic ‘1’ and V
ILmax
for a logic ‘0’.
0.2V
CC
+
0.9
0.2V
CC
0.1
Test Points
V
CC
0.5V
0.45V
V
LOAD
+
0.1
V
LOAD
0.1
Timing Reference Points
0.2V
CC
0.1
V
OH
0.1
V
OL
+
0.1
V
LOAD
For timing purposes a port pin is no longer floating when a 100mV change from load voltage
occurs and begins to float when a 100mV change from the loaded V
OH
/ V
OL
level occurs.
I
OL
/ I
OH
20mA.
t
CHCL
t
CLCH
t
CHCX
t
CLCL
t
CLCX
0.2 V
CC
0.1
0.7 V
CC
V
CC
0.5V
0.45V
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