参数资料
型号: P87C51RC2BN,112
厂商: NXP Semiconductors
文件页数: 3/67页
文件大小: 0K
描述: IC 80C51 MCU 512 RAM 40DIP
产品培训模块: Migrating from 8/16-Bit MCUs to 32-Bit ARMs
标准包装: 9
系列: 87C
核心处理器: 8051
芯体尺寸: 8-位
速度: 33MHz
连通性: EBI/EMI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 32KB(32K x 8)
程序存储器类型: OTP
RAM 容量: 512 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
其它名称: 935272150112
P87C51RC2BN
P87C51RC2BN-ND
Philips Semiconductors
Product data
P87C51RA2/RB2/RC2/RD2
80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
2003 Jan 24
11
CLOCK CONTROL REGISTER (CKCON)
This device allows control of the 6-clock/12-clock mode by means of
both an SFR bit (X2) and an OTP bit. The OTP clock control bit
OX2, when programmed (6-clock mode), supersedes the X2 bit
(CKCON.0). The CKCON register is shown below in Figure 1.
X2
BIT
SYMBOL
FUNCTION
CKCON.7
Reserved.
CKCON.6
Reserved.
CKCON.5
Reserved.
CKCON.4
Reserved.
CKCON.3
Reserved.
CKCON.2
Reserved.
CKCON.1
Reserved.
CKCON.0
X2
CPU clock; 1 = 6 clocks for each machine cycle, 0 = 12 clocks for each machine cycle
SU01689
Not Bit Addressable
CKCON
Address = 8Fh
Reset Value = x0000000B
76
54
321
0
––
Figure 1. Clock control (CKCON) register
Also please note that the clock divider applies to the serial port for
modes 0 & 2 (fixed baud rate modes). This is because modes 1 & 3
(variable baud rate modes) use either Timer 1 or Timer 2.
Below is the truth table for the CPU clock mode.
Table 1.
OX2 clock mode bit
(can only be set by
parallel programmer)
X2 bit
(CKCON.0)
CPU clock mode
erased
0
12-clock mode
(default)
erased
1
6-clock mode
programmed
X
6-clock mode
RESET
A reset is accomplished by holding the RST pin high for at least two
machine cycles (12 oscillator periods in 6-clock mode, or 24 oscillator
periods in 12-clock mode), while the oscillator is running. To ensure a
good power-on reset, the RST pin must be high long enough to allow
the oscillator time to start up (normally a few milliseconds) plus two
machine cycles. At power-on, the voltage on VCC and RST must
come up at the same time for a proper start-up. Ports 1, 2, and 3 will
asynchronously be driven to their reset condition when a voltage
above VIH1 (min.) is applied to RST.
The value on the EA pin is latched when RST is deasserted and has
no further effect.
相关PDF资料
PDF描述
VI-22Z-IX-F1 CONVERTER MOD DC/DC 2V 30W
VI-22Z-IW-F4 CONVERTER MOD DC/DC 2V 40W
UPD78F1162AGF-GAS-AX MCU 16BIT 78K0R/KX3 100-LQFP
VI-22Z-IW-F2 CONVERTER MOD DC/DC 2V 40W
VI-22Z-IW-F1 CONVERTER MOD DC/DC 2V 40W
相关代理商/技术参数
参数描述
P87C51RC2FA 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family
P87C51RC2FA,512 功能描述:8位微控制器 -MCU 80C51 32K/512 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
P87C51RC2FA,529 功能描述:8位微控制器 -MCU 32K/512 OTP 12 CLK IND PLCC 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
P87C51RC2FA512 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 33MHZ LCC-44
P87C51RC2FN 制造商:NXP Semiconductors 功能描述:P87C51RC2FN 8bit microcontroller,33MHz 制造商:NXP Semiconductors 功能描述:MCU 8-bit P87 80C51 CISC 32KB EPROM 3.3V/5V 40-Pin PDIP Tube