參數(shù)資料
型號： P89V51RC2FN,112
廠商： NXP Semiconductors
文件頁數(shù)： 28/80頁
文件大小： 0K
描述： IC 80C51 MCU FLASH 32K 40-DIP
產(chǎn)品培訓模塊： Migrating from 8/16-Bit MCUs to 32-Bit ARMs
標準包裝： 9
系列： 89V
核心處理器： 8051
芯體尺寸： 8-位
速度： 40MHz
連通性： SPI，UART/USART
外圍設備： 欠壓檢測/復位，POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 32KB（32K x 8）
程序存儲器類型： 閃存
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 40-DIP（0.600"，15.24mm）
包裝： 管件
產(chǎn)品目錄頁面： 706 (CN2011-ZH PDF)
配用： 622-1017-ND - BOARD 44-ZIF PLCC SOCKET
622-1001-ND - USB IN-CIRCUIT PROG 80C51ISP
其它名稱： 568-2430-5
935278782112
P89V51RC2FN
P89V51RB2_RC2_RD2_5
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 12 November 2009
34 of 80
NXP Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
In this mode, there are two options selected by bit EXEN2 in T2CON register. If
EXEN2 = 0, then Timer 2 counts up to 0FFFFH and sets the TF2 (Overow Flag) bit upon
overow. This causes the Timer 2 registers to be reloaded with the 16-bit value in
RCAP2L and RCAP2H. The values in RCAP2L and RCAP2H are preset by software
means.
Auto reload frequency when Timer 2 is counting up can be determined from this formula:
(1)
Where SupplyFrequency is either fosc (C/T2 = 0) or frequency of signal on T2 pin
(C/T2 = 1).
If EXEN2 = 1, a 16-bit reload can be triggered either by an overow or by a 1-to-0
transition at input T2EX. This transition also sets the EXF2 bit. The Timer 2 interrupt, if
enabled, can be generated when either TF2 or EXF2 is ‘1’.
Microcontroller’s hardware will need three consecutive machine cycles in order to
recognize falling edge on T2EX and set EXF2 = 1: in the rst machine cycle pin T2EX has
to be sampled as ‘1’; in the second machine cycle it has to be sampled as ‘0’, and in the
third machine cycle EXF2 will be set to ‘1’.
In Figure 14, DCEN = 1 and Timer 2 is enabled to count up or down. This mode allows pin
T2EX to control the direction of count. When a logic ‘1’ is applied at pin T2EX Timer 2 will
count up. Timer 2 will overow at 0FFFFH and set the TF2 ag, which can then generate
an interrupt, if the interrupt is enabled. This timer overow also causes the 16-bit value in
RCAP2L and RCAP2H to be reloaded into the timer registers TL2 and TH2.
Fig 13. Timer 2 in auto-reload mode (DCEN = 0)
002aaa524
OSC
÷6
T2 pin
C/T2 = 0
C/T2 = 1
TL2
(8-bits)
TH2
(8-bits)
TF2
control
reload
TR2
timer 2
interrupt
EXF2
RCAP2L RCAP2H
control
EXEN2
transition
detector
T2EX pin
SupplyFrequency
65536
RCAP2H RCAP2L
,
()
∠
()
--------------------------------------------------------------------------------
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相關代理商/技術參數(shù)
參數(shù)描述
P89V51RD2 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 64 kB Flash microcontroller with 1 kB RAM
P89V51RD2BN 制造商:NXP Semiconductors 功能描述:IC MCU 8BIT 80C51 64K FLASH DIP40 制造商:NXP Semiconductors 功能描述:IC, MCU 8BIT 80C51 64K FLASH, DIP40
P89V51RD2BN,112 功能描述:8位微控制器 -MCU 80C51 5V 16/32/64KB FLASH MCU 1 KB RAM 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 安裝風格:SMD/SMT
P89V51RD2FA 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 64K FLASH PLCC44
P89V51RD2FA,512 功能描述:8位微控制器 -MCU 80C51 64K FL / 1K RM 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 安裝風格:SMD/SMT
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