參數(shù)資料
型號(hào)： 935267925557
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP80
封裝： PLASTIC, QFP-80
文件頁數(shù)： 64/76頁
文件大?。?/td> 567K
代理商： 935267925557
Philips Semiconductors
Product specification
P83C557E4/P80C557E4/P89C557E4
Single-chip 8-bit microcontroller
1999 Mar 02
67
tCLKL
Figure 57. External Clock Drive waveform
VIH1
0.8V
tCLK
VIH1
0.8V
tCLKH
tCLKR
tCLKF
2.4 V
0.45 V
2.0 V
0.8 V
NOTE:
Figure 58. AC Testing Input/Output
2.4 V
NOTE:
Figure 59. AC Testing, Float Waveform
AC inputs during testing are driven at 2.4V for a logic ‘HIGH’ and 0.45V for a logic
‘LOW’. Timing measurements are made at 2.0 V for a logic ‘HIGH’ and 0.8 V for a
logic ‘LOW’.
2.4 V
0.45 V
Float
2.0 V
0.8 V
2.0 V
0.8 V
Test Points
2.0 V
0.8 V
sources 400
mA at the voltage test levels.
The float state is defined as the point at which a port 0 pins sinks 3.2 mA or
tPXIZ
Figure 60. External Program Memory Read Cycle
ALE
PSEN
PORT 0
PORT 2
A8–A15
A0–A7
tAVLL
tPXIX
tLLAX
INSTR IN
tPLIV
tLHLL
tPLPH
tLLIV
tPLAZ
tLLPL
tAVIV
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