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| 型号： | P87LPC764BDH,518 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 13/60页 |
| 文件大小： | 0K |
| 描述： | IC 80C51 MCU 4K OTP 20-TSSOP |
| 标准包装： | 2,500 |
| 系列： | LPC700 |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 连通性： | I²C，UART/USART |
| 外围设备： | 欠压检测/复位，LED，POR，WDT |
| 输入/输出数： | 18 |
| 程序存储器容量： | 4KB（4K x 8） |
| 程序存储器类型： | OTP |
| RAM 容量： | 128 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 6 V |
| 振荡器型： | 内部 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
| 其它名称： | P87LPC764BDH518 |
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Philips Semiconductors
Product data
P87LPC764
Low power, low price, low pin count (20 pin)
microcontroller with 4 kbyte OTP
2003 Sep 03
19
Open Drain Output
Configuration
The open drain output configuration turns off all pull-ups and only
drives the pull-down transistor of the port driver when the port latch
contains a logic 0. To be used as a logic output, a port configured in
this manner must have an external pull-up, typically a resistor tied to
VDD. The pull-down for this mode is the same as for the
quasi-bidirectional mode.
The open drain port configuration is shown in Figure 11.
Push-Pull Output
Configuration
The push-pull output configuration has the same pull-down structure
as both the open drain and the quasi-bidirectional output modes, but
provides a continuous strong pull-up when the port latch contains a
logic 1. The push-pull mode may be used when more source current
is needed from a port output.
The push-pull port configuration is shown in Figure 12.
The three port pins that cannot be configured are P1.2, P1.3, and
P1.5. The port pins P1.2 and P1.3 are permanently configured as
open drain outputs. They may be used as inputs by writing ones to
their respective port latches. P1.5 may be used as a Schmitt trigger
input if the P87LPC764 has been configured for an internal reset
and is not using the external reset input function RST.
Additionally, port pins P2.0 and P2.1 are disabled for both input and
output if one of the crystal oscillator options is chosen. Those
options are described in the Oscillator section.
The value of port pins at reset is determined by the PRHI bit in the
UCFG1 register. Ports may be configured to reset high or low as
needed for the application. When port pins are driven high at reset,
they are in quasi-bidirectional mode and therefore do not source
large amounts of current.
Every output on the P87LPC764 may potentially be used as a 20
mA sink LED drive output. However, there is a maximum total output
current for all ports which must not be exceeded.
All ports pins of the P87LPC764 have slew rate controlled outputs.
This is to limit noise generated by quickly switching output signals.
The slew rate is factory set to approximately 10 ns rise and fall times.
The bits in the P2M1 register that are not used to control
configuration of P2.1 and P2.0 are used for other purposes. These
bits can enable Schmitt trigger inputs on each I/O port, enable
toggle outputs from Timer 0 and Timer 1, and enable a clock output
if either the internal RC oscillator or external clock input is being
used. The last two functions are described in the Timer/Counters
and Oscillator sections respectively. The enable bits for all of these
functions are shown in Figure 13.
Each I/O port of the P87LPC764 may be selected to use TTL level
inputs or Schmitt inputs with hysteresis. A single configuration bit
determines this selection for the entire port. Port pins P1.2, P1.3,
and P1.5 always have a Schmitt trigger input.
SU01160
PORT
PIN
INPUT
DATA
PORT LATCH
DATA
N
Figure 11. Open Drain Output
SU01161
PORT
PIN
VDD
INPUT
DATA
PORT LATCH
DATA
N
P
Figure 12. Push-Pull Output
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相关代理商/技术参数 |
参数描述 |
|---|---|
| P87LPC764BN | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 87LC764 DIP20 制造商:NXP Semiconductors 功能描述:IC, 8BIT MCU, 87LC764, DIP20 制造商:NXP Semiconductors 功能描述:IC, 8BIT MCU, 80C51, 20MHZ, DIP-20; Controller Family/Series:(8051) 8052; Core Size:8bit; No. of I/O's:18; Supply Voltage Min:2.7V; Supply Voltage Max:6V; Digital IC Case Style:DIP; No. of Pins:20; Program Memory Size:4KB ;RoHS Compliant: Yes 制造商:NXP Semiconductors 功能描述:P87LPC764BN 8bit microcontroller,20MHz 制造商:NXP Semiconductors 功能描述:MCU 8-Bit 87LP 80C51 CISC 4KB EPROM 5V 20-Pin PDIP |
| P87LPC764BN,112 | 功能描述:8位微控制器 -MCU 80C51 4K/128 OTP RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| P87LPC764BN112 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 20MHZ DIP-20 |
| P87LPC764FD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count 20 pin microcontroller with 4 kbyte OTP |
| P87LPC764FD,512 | 功能描述:8位微控制器 -MCU 4K/128 OTP 2.7-6V EXT SO20 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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