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)： 22/108頁(yè)
文件大?。?/td> 1023K
代理商： T48C862X-RF-TNQ
22
T48C862-R4 [Preliminary]
4551C–4BMCU–01/04
A power-on reset pulse is generated by a V
DD
rise across the default BOT voltage level
(1.7 V). A brown-out reset pulse is generated when V
DD
falls below the brown-out volt-
age threshold. Two values for the brown-out voltage threshold are programmable via
the BOT bit in the SC register. When the controller runs in the upper supply voltage
range with a high system clock frequency, the high threshold must be used. When it
runs with a lower system clock frequency, the low threshold and a wider supply voltage
range may be chosen. For further details, see the electrical specification and the
SC register description for BOT programming.
Figure 16.
Brown-out Detection
Watchdog Reset
The watchdog’s function can be enabled at the WDC register and triggers a reset with
every watchdog counter overflow. To suppress the watchdog reset, the watchdog
counter must be regularly reset by reading the watchdog register address (CWD). The
CPU reacts in exactly the same manner as a reset stimulus from any of the above
sources.
External Clock Supervisor
The external input clock supervisor function can be enabled if the external input clock is
selected within the CM and SC registers of the clock module. The CPU reacts in exactly
the same manner as a reset stimulus from any of the above sources.
Voltage Monitor
The voltage monitor consists of a comparator with internal voltage reference. It is used
to supervise the supply voltage or an external voltage at the VMI pin. The comparator for
the supply voltage has three internal programmable thresholds one lower threshold (2.2
V), one middle threshold (2.6 V) and one higher threshold (3.0 V). For external voltages
at the VMI pin, the comparator threshold is set to V
BG
= 1.3 V. The VMS bit indicates if
the supervised voltage is below (VMS = 0) or above (VMS = 1) this threshold. An inter-
rupt can be generated when the VMS bit is set or reset to detect a rising or falling slope.
A voltage monitor interrupt (INT7) is enabled when the interrupt mask bit (VIM) is reset
in the VMC register.
VDD
CPU
Reset
t
BOT = '1'
2.0 V
1.7 V
CPU
Reset
BOT = '0'
td
td
td= 1.5 ms (typically)
td
BOT = 1, low brown-out voltage threshold 1.7 V (is reset value).
BOT = 0, high brown-out voltage threshold 2.0 V.
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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