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參數(shù)資料
| 型號： | L9942 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, PDSO36 |
| 封裝： | POWER, SO-36 |
| 文件頁數(shù)： | 4/21頁 |
| 文件大?。?/td> | 161K |
| 代理商： | L9942 |
STOP
XTAL
C1
C2 OSCOUT
OSCIN
MAIN
OSC
CPU
÷12
÷4
WATCH
DOG
MUX2
0
1
MUX1
0
1
OSCR
X
TEST
READY
FC2
FC1
FC0
COUNT
RESET
CAN CONTROLLER
MAINCLK
4.. 8MHz
32kHz
SBCLK
INT#3
INT#4
CONTACT MON.
CLOCK
INPUT
TIMER1
MUX3
0
1
COUNT
LOGIC
PA2/TIMER
EXT. TEST INPUT
3
GATE
RC
OSC
STOP
MSB
LSB
Figure 6. System clocking scheme.
The CPU and digital logic is supplied with a clock signal MAINCLK from main oscillator using an external
xtal or ceramic resonator. Two external capacitors C1 and C2 of 12 - 22pF each (according to the rec-
ommendation of the resonator supplier) have to be connected to the oscillator pins. OSCIN is the input,
OSCOUT is the output of the main oscillator. Also an external clock signal can be applied to OSCIN to
clock the device. Maximum frequency of the main oscillator is 8MHz.
For standby operation the main oscillator is switched off by execution of a STOP instruction of the appli-
cation software. After this instruction the CPU is in stop mode:
- no operation is performed
- all registers and memory cells keep their content
- voltage regulator is switched to standby mode
- current consumption is minimized
- contact monitors, TIMER1, watchdog are supplied with standby clock SBCLK
This state can be left only by interrupts (contact monitors, I/O, CAN-controller, timer) or by reset (exter-
nal, voltage regulator, watchdog).
In order to keep some basic functions in standby mode there is a separate low power RC oscillator. The
oscillator frequency of about 32kHz is generated using internal components only. This standby oscillator
operates permanently and cannot be stopped. It’s output signal SBCLK supplies the contact monitor cir-
cuitry as well as TIMER1 and watchdog (in STOP mode only). This configuration allows periodic CPU
wake up from STOP mode by timer interrupts as well as watchdog operation also in STOP mode. There-
fore in case of failure of the wake up mechanism the STOP mode is left by a watchdog generated reset.
MICROCONTROLLER SECTION (continued)
L9942
12/21
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L9942XP1 | 功能描述:低壓差穩(wěn)壓器 - LDO Integrated Stepper Bipolar Motor Driver RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L9942XP1TR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Integrated Stepper Bipolar Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L9946 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| L9947 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD HALF-BRIDGE AND SINGLE HIGH-SIDE DRIVER |
| L9947L | 制造商:STMicroelectronics 功能描述: |
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