參數(shù)資料
型號： P89LV51RB2BBC
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM
中文描述： 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝： 10 X 10 MM, 1 MM HEIGHT, PLASTIC, MS-026, SOT-376-1, TQFP-44
文件頁數(shù)： 32/77頁
文件大?。?/td> 349K
代理商： P89LV51RB2BBC
Philips Semiconductors
P89LV51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 04 — 02 December 2004
32 of 77
9397 750 14342
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
7.4.1
Capture mode
In the Capture Mode there are two options which are selected by bit EXEN2 in
T2CON. If EXEN2 = 0 Timer 2 is a 16-bit timer or counter (as selected by C/T2 in
T2CON) which upon overflowing sets bit TF2, the Timer 2 overflow bit.
Table 21:
Bit
7
T2CON - Timer/Counter 2 control register (address C8H) bit description
Symbol
Description
TF2
Timer 2 overflow flag set by a Timer 2 overflow and must be
cleared by software. TF2 will not be set when either RCLK or
TCLK = 1 or when Timer 2 is in Clock-out Mode.
EXF2
Timer 2 external flag is set when Timer 2 is in capture, reload or
baud-rate mode, EXEN2 = 1 and a negative transition on T2EX
occurs. If Timer 2 interrupt is enabled EXF2 = 1 causes the CPU to
vector to the Timer 2 interrupt routine. EXF2 must be cleared by
software.
RCLK
Receive clock flag. When set, causes the UART to use Timer 2
overflow pulses for its receive clock in modes 1 and 3. RCLK = 0
causes Timer 1 overflow to be used for the receive clock.
TCLK
Transmit clock flag. When set, causes the UART to use Timer 2
overflow pulses for its transmit clock in modes 1 and 3. TCLK = 0
causes Timer 1 overflows to be used for the transmit clock.
EXEN2
Timer 2 external enable flag. When set, allows a capture or reload
to occur as a result of a negative transition on T2EX if Timer 2 is
not being used to clock the serial port. EXEN2 = 0 causes Timer 2
to ignore events at T2EX.
TR2
Start/stop control for Timer 2. A logic ‘1’ enables the timer to run.
C/T2
Timer or counter select. (Timer 2)
0 = internal timer (f
osc
/6)
1 = External event counter (falling edge triggered; external
clock’s maximum rate = f
OSC
/12
CP/RL2
Capture/Reload flag. When set, captures will occur on negative
transitions at T2EX if EXEN2 = 1. When cleared, auto-reloads will
occur either with Timer 2 overflows or negative transitions at T2EX
when EXEN2 = 1. When either RCLK = 1 or TCLK = 1, this bit is
ignored and the timer is forced to auto-reload on Timer 2 overflow.
6
5
4
3
2
1
0
Table 22:
Not bit addressable; Reset value: XX000000B
Bit
7
Symbol
-
T2MOD - Timer 2 mode control register (address C9H) bit allocation
6
-
5
-
4
-
3
-
2
-
1
0
T2OE
DCEN
Table 23:
Bit
7 to 2
1
T2MOD - Timer 2 mode control register (address C9H) bit description
Symbol
Description
-
Reserved for future use. Should be set to ‘0’ by user programs.
T2OE
Timer 2 Output Enable bit. Used in programmable clock-out mode
only.
DCEN
Down Count Enable bit. When set, this allows Timer 2 to be
configured as an up/down counter.
0
相關PDF資料
PDF描述
P89LV51RB2 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM
P89LV51RB2BA 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM
P89LV51RD2BN 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM
P89LV51RD2 8-bit 80C51 3 V low power 64 kB Flash microcontroller with 1 kB RAM
P89LV51RD2BA 8-bit 80C51 3 V low power 64 kB Flash microcontroller with 1 kB RAM
相關代理商/技術參數(shù)
參數(shù)描述
P89LV51RB2BBC,557 功能描述:8位微控制器 -MCU 3V 16K/512 FL 12 CLK ISP/IAP 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
P89LV51RC2 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM
P89LV51RC2BN 功能描述:8位微控制器 -MCU 3V 16K/512 FL 12 CLK ISP/IAP 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
P89LV51RC2BN,112 功能描述:8位微控制器 -MCU P89LV51RC2BN/DIP40/TUBE-BULK// 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
P89LV51RC2FA 功能描述:8位微控制器 -MCU 3V 16K/512 FL 12 CLK ISP/IAP 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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