- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98023 > MM908E621ACDWB/R2 (FREESCALE SEMICONDUCTOR INC) 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 PDF資料下載
參數(shù)資料
| 型號(hào)： | MM908E621ACDWB/R2 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 |
| 封裝： | 17.90 X 7.50 MM, 0.65 MM PITCH, PLASTIC, SOIC-54 |
| 文件頁(yè)數(shù)： | 41/65頁(yè) |
| 文件大小： | 1221K |
| 代理商： | MM908E621ACDWB/R2 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)當(dāng)前第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)
Analog Integrated Circuit Device Data
46
Freescale Semiconductor
908E621
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
If the watchdog is enabled, it will generate a system reset,
if the timer has reached its end value, or if a watchdog reset
(WDRST) has occurred in the closed window.
The watchdog period can be selected with 2 bits in the
WDCTL, in order to get 10ms, 20ms, 40ms and 80ms period.
Figure 28. Window Watchdog Period
Stop mode
Operations of the watchdog function is halted in stop mode
(counter/oscillator stopped). After wake-up, the watchdog
timer is automatically cleared, in order to give the MCU the
full time to reset the watchdog.
Sleep mode
Operations of the watchdog function is halted in sleep
mode. Because the main voltage regulator asserts an LVR
reset, the Watchdog functionality is disabled, and the WDRE
bit is cleared as soon as sleep mode is entered. To re-enable
this function bit WDRE has to be set after wake-up.
Watchdog Control Register (WDCTL)
WDRE - Watchdog Reset Enable Bit
This read/write (write once) bit activates the watchdog.
The WDRE can only be set and can not be cleared by
software. Reset clears the WDRE bit.
1 = Watchdog enabled
0 = Watchdog disabled
WDP1:0 - Watchdog Period Select Bits
This read/write bit select the clock rate of the Watchdog.
Reset clears the WDP1:0 bits.
Table 11. Watchdog Period Selection Bits
WDRST - Watchdog Reset Bit
This write only bit resets the Watchdog. Write a logic [1] to
reset the watchdog timer.
1 = Reset WD and restart timer
0 = no effect
Voltage Regulator
The 908E621 contains a low power, low drop voltage
regulator, to provide internal power and external power for
the MCU. The on-chip regulator consist of two elements, the
main regulator and the low voltage reset circuit.
The VDD regulator accepts an unregulated input supply
and provides a regulated VDD supply to all digital sections of
the device. The output of the regulator is also connected to
the VDD pin to provide the 5.0V to the microcontroller.
Run mode
During RUN mode the main voltage regulator is on. It will
provide a regulated supply to all digital sections.
STOP mode
During STOP mode, the Stop mode regulator will take care
of suppling a regulated output voltage. The Stop mode
regulator has a limited output current capability.
SLEEP mode
In Sleep mode, the main voltage regulator external, VDD,
is turned off and the LVR circuitry will force the RST_A pin
low.
Register Name and Address: WDCTL - $0B
Bit7
6
5
4
3
2
1
Bit0
Read
WDRE
WDP1
WDP0
0
000
0
Write
WDRST
Reset
0
Window closed
no watch dog clear allowed
Window open
for watch dog clear
WD timing x 50%
WD period ( timing selected by Bits WDP1:0)
WDP1
WDP0
Mode
0
80ms window watchdog period
0
1
40ms window watchdog period
1
0
20ms window watchdog period
1
10ms window watchdog period
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MM908E621ACDWB | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 |
| MM908E622ACDWB/R2 | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 |
| MM908E624ACDWB/R | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 |
| MM908E625ACDWB | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 |
| MMBD1010LT3 | 0.2 A, 2 ELEMENT, SILICON, SIGNAL DIODE, TO-236AB |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM908E621ACPEK | 功能描述:8位微控制器 -MCU QUAD H-B/3-HS W/MCU & LI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| MM908E621ACPEKR2 | 功能描述:8位微控制器 -MCU QUAD HB AND TRIPLE HS RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| MM908E622 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-Bridge, Triple High-Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror |
| MM908E622_08 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-bridge, Triple High Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror |
| MM908E622ACDR2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-Bridge, Triple High-Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。