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）
文件頁數(shù)： 6/78頁
文件大?。?/td> 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
6
PIN DESCRIPTION
(Continued)
PIN NO.
MNEMONIC
PLCC
QFP
TYPE
NAME AND FUNCTION
P4.0-P4.7
7-14
80, 1-2
4-8
80, 1-2
4-6
7, 8
I/O
Port 4:
8-bit programmable I/O port. Alternate functions include:
7-12
O
CMSR0-CMSR5 (P4.0-P4.5):
Timer T2 compare and set/reset outputs on a match with
timer T2.
CMT0, CMT1 (P4.6, P4.7):
Timer T2 compare and toggle outputs on a match with timer T2.
13, 14
O
Port 4 has four modes selected on a per bit basis by writing to the P4M1 and P4M2
registers as follows:
P4M1.x
P4M2.x
Mode Description
0
0
Pseudo-bidirectional (standard c51 configuration; default)
0
1
Push-Pull
1
0
High impedance
1
1
Open drain
P5.0-P5.7
68-62,
1
71-64
I
Port 5:
8-bit input port.
ADC0-ADC7 (P5.0-P5.7):
Alternate function: Eight input channels to the ADC.
RST
15
9
I/O
Reset:
Input to reset the 87C554. It also provides a reset pulse as output when timer T3
overflows.
XTAL1
35
32
I
Crystal Input 1:
Input to the inverting amplifier that forms the oscillator, and input to the
internal clock generator. Receives the external clock signal when an external oscillator is
used.
XTAL2
34
31
O
Crystal Input 2:
Output of the inverting amplifier that forms the oscillator. Left open-circuit
when an external clock is used.
V
SS
PSEN
36, 37
34-36
I
Digital ground.
47
48
O
Program Store Enable:
Active-low read strobe to external program memory.
ALE/PROG
48
49
O
Address Latch Enable:
Latches the low byte of the address during accesses to external
memory. It is activated every six oscillator periods. During an external data memory
access, one ALE pulse is skipped. ALE can drive up to eight LS TTL inputs and handles
CMOS inputs without an external pull-up. This pin is also the program pulse input (PROG)
during EPROM programming.
EA/V
PP
49
50
I
External Access:
When EA is held at TTL level high, the CPU executes out of the internal
program ROM provided the program counter is less than 16,384. When EA is held at TTL
low level, the CPU executes out of external program memory. EA is not allowed to float.
This pin also receives the 12.75V programming supply voltage (V
PP
) during EPROM
programming.
AV
REF–
AV
REF+
AV
SS
AV
DD
NOTE:
1. To avoid “l(fā)atch-up” effect at power-on, the voltage on any pin at any time must not be higher or lower than V
DD
+ 0.5V or V
SS
– 0.5V,
respectively.
58
59
I
Analog to Digital Conversion Reference Resistor:
Low-end.
59
60
I
Analog to Digital Conversion Reference Resistor:
High-end.
60
61
I
Analog Ground
61
63
I
Analog Power Supply
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參數(shù)描述
P87C554SBAA 制造商:NXP Semiconductors 功能描述:MCU 8-Bit 87C 80C51 CISC 16KB EPROM 5V 68-Pin PLCC
P87C554SBAA,512 功能描述:8位微控制器 -MCU 80C51 16K/512 OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
P87C554SBBD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述: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
P87C554SFAA 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller ? 12 clock operation 16K/512 OTP/RAM 8 channel 10-bit A/D, I2C, PWM, capture/compare, high I/O
P87C554SFAA,512 功能描述:8位微控制器 -MCU 80C51 16K/512 OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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