參數(shù)資料
型號(hào): P87C554
廠商: NXP Semiconductors N.V.
英文描述: 80C51 8-bit microcontroller(80C51 8位微控制器)
中文描述: 80C51的8位微控制器(80C51的8位微控制器)
文件頁(yè)數(shù): 70/78頁(yè)
文件大小: 393K
代理商: P87C554
Philips Semiconductors
Preliminary specification
80C554/83C554/87C554
80C51 8-bit microcontroller
16K/512 OTP/ROM/ROMless, 8 channel 10 bit A/D, I
2
C, PWM,
capture/compare, high I/O
1999 Apr 07
70
2.4V
0.45V
2.0V
0.8V
NOTE:
AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at 2.0V for a logic ‘1’ and 0.8V for a logic ‘0’.
Test Points
2.0V
0.8V
SU00215
Figure 54. AC Testing Input/Output
2.4V
NOTE:
The float state is defined as the point at which a port 0 pin sinks 3.2mA or sources 400
μ
A at the voltage test levels.
2.4V
0.45V
0.45V
Float
2.0V
0.8V
2.0V
0.8V
SU00216
Figure 55. AC Testing Input, Float Waveform
t
RD
t
SU;STA
t
BUF
t
SU;STO
0.7 V
CC
0.3 V
CC
0.7 V
CC
0.3 V
CC
t
FD
t
RC
t
FC
t
HIGH
t
LOW
t
HD;STA
t
SU;DAT1
t
HD;DAT
t
SU;DAT2
t
SU;DAT3
START condition
repeated START condition
SDA
(INPUT/OUTPUT)
SCL
(INPUT/OUTPUT)
STOP condition
START or repeated START condition
SU00107A
Figure 56. Timing SIO1 (I
2
C) Interface
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