- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382369 > P87LPC760 (NXP Semiconductors N.V.) Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP PDF資料下載
參數(shù)資料
| 型號： | P87LPC760 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP |
| 中文描述： | 低功耗，低價格，低引腳數(shù)（14針），1字節(jié)檢察官辦公室微控制器 |
| 文件頁數(shù)： | 20/56頁 |
| 文件大小： | 290K |
| 代理商： | P87LPC760 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
Philips Semiconductors
Preliminary data
P87LPC760
Low power, low price, low pin count (14 pin)
microcontroller with 1 kbyte OTP
2002 Mar 07
17
I/O Ports
The P87LPC760 has 3 I/O ports, port 0, port 1, and port 2. The
exact number of I/O pins available depend upon the oscillator and
reset options chosen. At least 9 pins of the P87LPC760 may be
used as I/Os when a two-pin external oscillator and an external
reset circuit are used. Up to 12 pins may be available if fully on-chip
oscillator and reset configurations are chosen.
All but three I/O port pins on the P87LPC760 may be software
configured to one of four types on a bit-by-bit basis, as shown in
Table 4. These are: quasi-bidirectional (standard 80C51 port
outputs), push-pull, open drain, and input only. Two configuration
registers for each port choose the output type for each port pin.
Table 4. Port Output Configuration Settings
PxM1.y
PxM2.y
Port Output Mode
0
0
Quasi-bidirectional
0
1
Push-Pull
1
0
Input Only (High Impedance)
1
1
Open Drain
Quasi-Bidirectional Output
Configuration
The default port output configuration for standard P87LPC760 I/O
ports is the quasi-bidirectional output that is common on the 80C51
and most of its derivatives. This output type can be used as both an
input and output without the need to reconfigure the port. This is
possible because when the port outputs a logic high, it is weakly
driven, allowing an external device to pull the pin low. When the pin
is pulled low, it is driven strongly and able to sink a fairly large
current. These features are somewhat similar to an open drain
output except that there are three pull-up transistors in the
quasi-bidirectional output that serve different purposes.
One of these pull-ups, called the “very weak” pull-up, is turned on
whenever the port latch for the pin contains a logic 1. The very weak
pull-up sources a very small current that will pull the pin high if it is
left floating.
A second pull-up, called the “weak” pull-up, is turned on when the
port latch for the pin contains a logic 1 and the pin itself is also at a
logic 1 level. This pull-up provides the primary source current for a
quasi-bidirectional pin that is outputting a 1. If a pin that has a logic 1
on it is pulled low by an external device, the weak pull-up turns off,
and only the very weak pull-up remains on. In order to pull the pin
low under these conditions, the external device has to sink enough
current to overpower the weak pull-up and take the voltage on the
port pin below its input threshold.
The third pull-up is referred to as the “strong” pull-up. This pull-up is
used to speed up low-to-high transitions on a quasi-bidirectional port
pin when the port latch changes from a logic 0 to a logic 1. When
this occurs, the strong pull-up turns on for a brief time, two CPU
clocks, in order to pull the port pin high quickly. Then it turns off
again.
The quasi-bidirectional port configuration is shown in Figure 10.
SU01159
WEAK
VERY
WEAK
STRONG
PORT
PIN
V
DD
2 CPU
CLOCK DELAY
INPUT
DATA
PORT LATCH
DATA
N
P
P
P
Figure 10. Quasi-Bidirectional Output
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P87LPC761 | Low power, low price, low pin count (16 pin) microcontroller with 2 kbyte OTP |
| P87LPC762 | Low power, low price, low pin count 20 pin microcontroller with 2 kbyte OTP |
| P87LPC768 | Low Power, Low System Cost 80C51 MCU with ADC and PWM |
| P87LPC768BN | Low Power, Low System Cost 80C51 MCU with ADC and PWM |
| P88-3004 | TONER VACUUM STD 220/240V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P87LPC760BDH | 功能描述:8位微控制器 -MCU 80C51 1K/128 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 |
| P87LPC760BDH,112 | 功能描述:8位微控制器 -MCU 80C51 1K/128 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 |
| P87LPC760BDH,118 | 功能描述:8位微控制器 -MCU 14 PIN MCU 1KBYTE 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 |
| P87LPC760BN | 功能描述:8位微控制器 -MCU 1K/128 OTP 2.7-6V COMM DIP 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 |
| P87LPC760BN,112 | 功能描述:8位微控制器 -MCU 1K/128 OTP 2.7-6V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。