80C51 8-bit microcontroller family 8KB/16KB/32KB/64K" />
參數(shù)資料
型號: P87C51RB2BA,512
廠商: NXP Semiconductors
文件頁數(shù): 3/67頁
文件大?。?/td> 0K
描述: IC 80C51 MCU 512 RAM 44PLCC
產(chǎn)品培訓(xùn)模塊: Migrating from 8/16-Bit MCUs to 32-Bit ARMs
標(biāo)準(zhǔn)包裝: 26
系列: 87C
核心處理器: 8051
芯體尺寸: 8-位
速度: 33MHz
連通性: EBI/EMI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: OTP
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
其它名稱: 935271248512
P87C51RB2BA
P87C51RB2BA-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.
相關(guān)PDF資料
PDF描述
MAX321CSA+ IC SWITCH DUAL SPST 8SOIC
VE-21B-IY-F2 CONVERTER MOD DC/DC 95V 50W
DG417DY+ IC SWITCH SPST 8SOIC
MAX14535EEVB+ IC SWITCH DPDT 10UTQFN
VE-21B-IY-F1 CONVERTER MOD DC/DC 95V 50W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P87C51RB2BBD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family
P87C51RB2BBD,157 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
P87C51RB2BN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family
P87C51RB2BN,112 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
P87C51RB2FA 制造商:NXP Semiconductors 功能描述:MCU 8-bit P87 80C51 CISC 16KB EPROM 3.3V/5V 44-Pin PLCC Tube