參數(shù)資料
型號(hào)： T48C862x-Rf-TNQ
廠商： Atmel Corp.
元件分類(lèi)： 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(yè)數(shù)： 24/108頁(yè)
文件大?。?/td> 1023K
代理商： T48C862X-RF-TNQ
24
T48C862-R4 [Preliminary]
4551C–4BMCU–01/04
Figure 18.
Internal Supply Voltage Supervisor
Figure 19.
External Input Voltage Supervisor
Clock Generation
Clock Module
The T48C862-R4 contains a clock module with 4 different internal oscillator types: two
RC-oscillators, one 4-MHz crystal oscillator and one 32-kHz crystal oscillator. The pins
OSC1 and OSC2 are the interface to connect a crystal either to the 4-MHz, or to the
32-kHz crystal oscillator. OSC1 can be used as input for external clocks or to connect an
external trimming resistor for the RC-oscillator 2. All necessary circuitry, except the crys-
tal and the trimming resistor, is integrated on-chip. One of these oscillator types or an
external input clock can be selected to generate the system clock (SYSCL).
In applications that do not require exact timing, it is possible to use the fully integrated
RC-oscillator 1 without any external components. The RC-oscillator 1 center frequency
tolerance is better than
±
50%. The RC-oscillator 2 is a trimmable oscillator whereby the
oscillator frequency can be trimmed with an external resistor attached between OSC1
and V
DD
. In this configuration, the RC-oscillator 2 frequency can be maintained stable
with a tolerance of
±
15% over the full operating temperature and voltage range.
The clock module is programmable via software with the clock management register
(CM) and the system configuration register (SC). The required oscillator configuration
can be selected with the OS1 bit and the OS0 bit in the SC register. A programmable
4-bit divider stage allows the adjustment of the system clock speed. A special feature of
the clock management is that an external oscillator may be used and switched on and
off via a port pin for the power-down mode. Before the external clock is switched off, the
internal RC-oscillator 1 must be selected with the CCS bit and then the SLEEP mode
may be activated. In this state an interrupt can wake up the controller with the RC-oscil-
lator, and the external oscillator can be activated and selected by software. A
synchronization stage avoids too short clock periods if the clock source or the clock
speed is changed. If an external input clock is selected, a supervisor circuit monitors the
external input and generates a hardware reset if the external clock source fails or drops
below 500 kHz for more than 1 ms.
VDD
Low threshold
Middle threshold
High threshold
VMS = 1
Low threshold
Middle threshold
High threshold
VMS = 0
3.0 V
2.6 V
2.2 V
1.3 V
VMI
VMS = 1
VMS = 0
Positive slope
Negative slope
VMS = 1
VMS = 0
Interrupt negative slope
Interrupt positive slope
Internal reference level
t
相關(guān)PDF資料
PDF描述
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(chēng):ATMEL Corporation 功能描述:Microcontroller with UHF ASK/FSK Transmitter
T48C893 制造商:ATMEL 制造商全稱(chēng):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(chēng):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(chēng):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(chēng):Welwyn Components Limited 功能描述:High Voltage Precision Thick Film Resistors
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