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参数资料
| 型号： | MM908E626AVEK |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | FLASH, 32 MHz, MICROCONTROLLER, PDSO54 |
| 封装： | 5.10 X 10.30 MM, 0.65 MM PITCH, LEAD FREE, SOIC-54 |
| 文件页数： | 21/43页 |
| 文件大小： | 842K |
| 代理商： | MM908E626AVEK |
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Analog Integrated Circuit Device Data
28
Freescale Semiconductor
908E626
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Figure 15. BEMF Signal Generation
HALF-BRIDGE OVER-TEMPERATURE
PROTECTION
The half-bridge outputs provide an over-temperature
prewarning with the HTF in the Interrupt Flag Register (IFR).
In order to protect the outputs against over-temperature, the
High Temperature Reset must be enabled. If this value is
reached, the part generates a reset and disables all power
outputs.
HALF-BRIDGE OVER-CURRENT PROTECTION
The half-bridges are protected against short to GND, short
to VSUP, and load shorts.
In the event an over-current on the high side is detected,
the high side MOSFETs on all HB high side MOSFETs are
switched off automatically. In the event an over-current on the
low side is detected, all HB low side MOSFETs are switched
off automatically. In both cases, the over-current status flag
HB_OCF in the System Status Register (SYSSTAT) is set.
The over-current status flag is cleared (and the outputs re-
enabled) by writing a logic [1] to the HB_OCF flag in the
System Status Register or by reset.
HALF-BRIDGE OVER-VOLTAGE/UNDER-
VOLTAGE
The half-bridge outputs are protected against under-
voltage and over-voltage conditions. This protection is done
by the low and high voltage interrupt circuitry. If one of these
flags (LVF, HVF) is set, the outputs are automatically
disabled.
The over-voltage/under-voltage status flags are cleared
(and the outputs re-enabled) by writing a logic [1] to the LVF/
HVF flags in the Interrupt Flag Register or by reset. Clearing
this flag is useless as long as a high or low voltage condition
is present.
Half-bridge Control Register (HBCTL)
OFC_EN—H-bridge Offset Chopping Enable Bit
This read/write bit enables offset chopping. Reset clears
the OFC_EN bit.
1 = Offset chopping enabled.
0 = Offset chopping disabled.
Coil Current
Voltage on
1
BEMF Signal
Register Name and Address: HBCTL - $02
Bit7
6
5
4
3
2
1
Bit0
Read
OFC_EN
CSA
0
CLS2 CLS1 CLS0
Write
Reset
0
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相关代理商/技术参数 |
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|---|---|
| MM908E626AVPEK | 功能描述:8位微控制器 -MCU MCU + LIN + MOTOR DRIVER RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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| MM90R9F | 制造商:Ohmite Mfg Co 功能描述: |
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