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參數(shù)資料
| 型號： | T48C862x-Rf-TNQ |
| 廠商： | Atmel Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | Microcontroller with UHF ASK/FSK Transmitter |
| 中文描述： | 微控制器，帶有超高頻ASK / FSK發(fā)射器 |
| 文件頁數(shù)： | 44/108頁 |
| 文件大?。?/td> | 1023K |
| 代理商： | T48C862X-RF-TNQ |
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44
T48C862-R4 [Preliminary]
4551C–4BMCU–01/04
Timer 2
8-/12-bit Timer for:
Interrupt, square-wave, pulse and duty cycle generation
Baud-rate generation for the internal shift register
Manchester and Biphase modulation together with the SSI
Carrier frequency generation and modulation together with the SSI
Timer 2 can be used as an interval timer for interrupt generation, as signal generator or
as baud-rate generator and modulator for the serial interface. It consists of a 4-bit and
an 8-bit up counter stage which both have compare registers. The 4-bit counter stages
of Timer 2 are cascadable as a 12-bit timer or as an 8-bit timer with 4-bit prescaler. The
timer can also be configured as an 8-bit timer and a separate 4-bit prescaler.
The Timer 2 input can be supplied via the system clock, the external input clock (T2I),
the Timer 1 output clock, the Timer 3 output clock or the shift clock of the serial inter-
face. The external input clock T2I is not synchronized with SYSCL. Therefore, it is
possible to use Timer 2 with a higher clock speed than SYSCL. Furthermore, with that
input clock the Timer 2 operates in the power-down mode SLEEP (CPU core -> sleep
and OSC-Stop -> yes) as well as in the POWER-DOWN (CPU core -> sleep and OSC-
Stop -> no). All other clock sources supplied no clock signal in SLEEP. The 4-bit counter
stages of Timer 2 have an additional clock output (POUT).
Its output has a modulator stage that allows the generation of pulses as well as the gen-
eration and modulation of carrier frequencies. The Timer 2 output can modulate with the
shift register data output to generate Biphase- or Manchester code.
If the serial interface is used to modulate a bitstream, the 4-bit stage of Timer 2 has a
special task. The shift register can only handle bitstream lengths divisible by 8. For other
lengths, the 4-bit counter stage can be used to stop the modulator after the right bit-
count is shifted out.
If the timer is used for carrier frequency modulation, the 4-bit stage works together with
an additional 2-bit duty cycle generator like a 6-bit prescaler to generate carrier fre-
quency and duty cycle. The 8-bit counter is used to enable and disable the modulator
output for a programmable count of pulses.
For programming the time interval, the timer has a 4-bit and an 8-bit compare register.
For programming the timer function, it has four mode and control registers. The compar-
ator output of stage 2 is controlled by a special compare mode register (T2CM). This
register contains mask bits for the actions (counter reset, output toggle, timer interrupt)
which can be triggered by a compare match event or the counter overflow. This archi-
tecture enables the timer function for various modes.
The Timer 2 has a 4-bit compare register (T2CO1) and an 8-bit compare register
(T2CO2). Both these compare registers are cascadable as a 12-bit compare register, or
8-bit compare register and 4-bit compare register.
For 12-bit compare data value: m = x +1
0
≤
x
≤
4095
For 8-bit compare data value: n = y +1
0
≤
y
≤
255
For 4-bit compare data value: l = z +1
0
≤
z
≤
15
相關(guān)PDF資料 |
PDF描述 |
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| T48C862x-Rf-TNS | Microcontroller with UHF ASK/FSK Transmitter |
| T48C893 | The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TK | The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TKQ | The multiple times programmable (MTP) version for the MARC4 ROM types |
| T500 | DIL 14 PIN SINGLE OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T48C862X-RF-TNS | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with UHF ASK/FSK Transmitter |
| T48C893 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TK | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TKQ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48D | 制造商:WELWYN 制造商全稱:Welwyn Components Limited 功能描述:High Voltage Precision Thick Film Resistors |
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