參數(shù)資料
型號: P87C552
廠商: NXP Semiconductors N.V.
英文描述: 80C51 8-bit microcontroller(80C51八位微控制器)
中文描述: 80C51的8位微控制器(80C51的八位微控制器)
文件頁數(shù): 27/74頁
文件大?。?/td> 368K
代理商: P87C552
Philips Semiconductors
Preliminary specification
P87C552
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I
2
C, PWM,
capture/compare, high I/O, low voltage (2.7V–5.5V), low power
1999 Mar 30
27
R
S
V
ANALOG
INPUT
C
S
C
C
TO COMPARATOR
+
I
N
I
N+1
Sm
N+1
Sm
N
Rm
N+1
Rm
N
MULTIPLEXER
Rm = 0.5 - 3 k
C
S
+ C
C
= 15pF maximum
R
S
= Recommended < 9.6 k
for 1 LSB @ 12MHz
NOTE:
Because the analog to digital converter has a sampled-data comparator, the input looks capacitive to a source. When a conversion
is initiated, switch Sm closes for 8t
CY
(8
μ
s @ 12MHz crystal frequency) during which time capacitance C
S
+ C
C
is charged. It should
be noted that the sampling causes the analog input to present a varying load to an analog source.
SU00962
Figure 24. A/D Input: Equivalent Circuit
0
q
2q
3q
4q
5q
V
in
CODE
OUT
100
000
001
010
011
101
QUANTIZATION ERROR
q = LSB = 5 mV
V
in
– V
digital
+ q/2
– q/2
V
in
SYMMETRICAL QUANTIZATION ERROR
SU00963
Figure 25. Effective Conversion Characteristic
相關(guān)PDF資料
PDF描述
P87C554SBBD 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP
P83C554SBBD 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP
P80C554SBBD 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP
P87C554SFBD 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP
P83C554SFBD 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP
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