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參數(shù)資料
| 型號： | TS80C51RA2-LCBB |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | High Performance 8-bit Microcontrollers |
| 中文描述： | 8-BIT, 30 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 18/74頁 |
| 文件大?。?/td> | 903K |
| 代理商： | TS80C51RA2-LCBB |
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18
Rev. C - 06 March, 2001
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
6.4. Timer 2
The timer 2 in the
TS80C51RX2
is compatible with the timer 2 in the 80C52.
It is a 16-bit timer/counter: the count is maintained by two eight-bit timer registers, TH2 and TL2, connected in
cascade. It is controlled by T2CON register (See Table 6) and T2MOD register (See Table 7). Timer 2 operation
is similar to Timer 0 and Timer 1. C/T2 selects F
OSC
/12 (timer operation) or external pin T2 (counter operation)
as the timer clock input. Setting TR2 allows TL2 to be incremented by the selected input.
Timer 2 has 3 operating modes: capture, autoreload and Baud Rate Generator. These modes are selected by the
combination of RCLK, TCLK and CP/RL2 (T2CON), as described in the Atmel Wireless & Microcontrollers 8-
bit Microcontroller Hardware description.
Refer to the Atmel Wireless & Microcontrollers 8-bit Microcontroller Hardware description for the description of
Capture and Baud Rate Generator Modes.
In
TS80C51RX2
Timer 2 includes the following enhancements:
Auto-reload mode with up or down counter
Programmable clock-output
6.4.1. Auto-Reload Mode
The auto-reload mode configures timer 2 as a 16-bit timer or event counter with automatic reload. If DCEN bit
in T2MOD is cleared, timer 2 behaves as in 80C52 (refer to the Atmel Wireless & Microcontrollers 8-bit
Microcontroller Hardware description). If DCEN bit is set, timer 2 acts as an Up/down timer/counter as shown in
Figure 5. In this mode the T2EX pin controls the direction of count.
When T2EX is high, timer 2 counts up. Timer overflow occurs at FFFFh which sets the TF2 flag and generates
an interrupt request. The overflow also causes the 16-bit value in RCAP2H and RCAP2L registers to be loaded
into the timer registers TH2 and TL2.
When T2EX is low, timer 2 counts down. Timer underflow occurs when the count in the timer registers TH2 and
TL2 equals the value stored in RCAP2H and RCAP2L registers. The underflow sets TF2 flag and reloads FFFFh
into the timer registers.
The EXF2 bit toggles when timer 2 overflows or underflows according to the the direction of the count. EXF2
does not generate any interrupt. This bit can be used to provide 17-bit resolution.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS80C51RA2-LCBD | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCBR | GT 35C 35#12 PIN PLUG |
| TS80C51RA2-LIED | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LIER | High Performance 8-bit Microcontrollers |
| TS80C51RA2-LIJB | High Performance 8-bit Microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C51RA2-LCBD | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCBR | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCE | 功能描述:IC MCU 8BIT 256BYTE 30MHZ 44VQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 標準包裝:1,500 系列:AVR® ATtiny 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C，LIN，SPI，UART/USART，USI 外圍設(shè)備:欠壓檢測/復位，POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):16 程序存儲器容量:8KB（4K x 16） 程序存儲器類型:閃存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 11x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:帶卷 (TR) |
| TS80C51RA2-LCEB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCED | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
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