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參數(shù)資料
| 型號： | P89LV51RC2BN |
| 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, PDIP40 |
| 封裝： | 0.600 INCH, PLASTIC, MO-015, SOT-129-1, DIP-40 |
| 文件頁數(shù)： | 36/77頁 |
| 文件大?。?/td> | 349K |
| 代理商： | P89LV51RC2BN |
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Philips Semiconductors
P89LV51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 04 — 02 December 2004
36 of 77
9397 750 14342
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
7.4.4
Baud rate generator mode
Bits TCLK and/or RCLK in T2CON allow the UART) transmit and receive baud rates
to be derived from either Timer 1 or Timer 2 (See
Section 7.5 “UARTs” on page 37
for
details). When TCLK = 0, Timer 1 is used as the UART transmit baud rate generator.
When TCLK =
1
, Timer 2 is used as the UART transmit baud rate generator. RCLK
has the same effect for the UART receive baud rate. With these two bits, the serial
port can have different receive and transmit baud rates – Timer 1 or Timer 2.
Figure 15
shows Timer 2 in baud rate generator mode:
The baud rate generation mode is like the auto-reload mode, when a rollover in TH2
causes the Timer 2 registers to be reloaded with the 16-bit value in registers
RCAP2H and RCAP2L, which are preset by software.
The baud rates in modes 1 and 3 are determined by Timer 2’s overflow rate given
below:
Modes 1 and 3 Baud Rates = Timer 2 Overflow Rate/16
The timer can be configured for either ‘timer’ or ‘counter’ operation. In many
applications, it is configured for ‘timer' operation (C/T2 = 0). Timer operation is
different for Timer 2 when it is being used as a baud rate generator.
Usually, as a timer it would increment every machine cycle (i.e.,
1
6
the oscillator
frequency). As a baud rate generator, it increments at the oscillator frequency. Thus
the baud rate formula is as follows:
Modes 1 and 3 Baud Rates =
(3)
Where: (RCAP2H, RCAP2L) = The content of RCAP2H and RCAP2L taken as a
16-bit unsigned integer.
Fig 15. Timer 2 in Baud Rate Generator mode.
002aaa526
OSC
2
T2 pin
C/T2 = 0
C/T2 = 1
control
TR2
RCAP2L RCAP2H
control
EXEN2
transition
detector
T2EX pin
reload
TX/RX baud rate
TL2
(8-bits)
TH2
(8-bits)
EXF2
Timer 2
interrupt
OscillatorFrequency
65536
RCAP2H RCAP2L
–
16
)
)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(shí)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 |
| 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(shí)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 |
| P89LV51RC2FA,512 | 功能描述:8位微控制器 -MCU 3V 16K/512 FL 12 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(shí)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 |
| P89LV51RC2FBC | 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(shí)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 |
| P89LV51RC2FBC,557 | 功能描述:8位微控制器 -MCU 3V 16K/512 FL 12 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(shí)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 |
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