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參數(shù)資料
| 型號： | TS80C51RD2-VIB |
| 廠商： | International Rectifier |
| 英文描述： | High Performance 8-bit Microcontroller |
| 中文描述： | 高性能8位微控制器 |
| 文件頁數(shù)： | 19/85頁 |
| 文件大?。?/td> | 762K |
| 代理商： | TS80C51RD2-VIB |
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19
4188E–8051–08/06
AT/TS8xC51Rx2
6.2
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 6-2) and T2MOD register
(See Table 6-3). 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 8-bit Microcontroller Hardware description.
Refer to the Atmel 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
6.2.1
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 8-bit
Microcontroller Hardware description). If DCEN bit is set, timer 2 acts as an Up/down
timer/counter as shown in Figure 6-2. 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 under-
flow 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 |
|---|---|
| TS80C51RD2-VIE | High Performance 8-bit Microcontroller |
| TS83C51RB2-LCB | High Performance 8-bit Microcontroller |
| TS83C51RB2-LCE | High Performance 8-bit Microcontroller |
| TS83C51RB2-LIB | High Performance 8-bit Microcontroller |
| TS83C51RB2-LIE | High Performance 8-bit Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C51RD2-VIBB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TS80C51RD2-VIBD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TS80C51RD2-VIBR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TS80C51RD2-VIE | 功能描述:IC MCU 8BIT 768BYTE 40MHZ 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) |
| TS80C51RD2-VIEB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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