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参数资料
| 型号： | MM908E621ACDWB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO54 |
| 封装： | 17.90 X 7.50 MM, 0.65 MM PITCH, PLASTIC, SOIC-54 |
| 文件页数： | 33/62页 |
| 文件大小： | 917K |
| 代理商： | MM908E621ACDWB |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
39
908E621
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Half-Bridge Overvoltage/Undervoltage Protection
The half-bridge outputs are protected against
undervoltage and overvoltage conditions. This protection is
done by the low and high voltage interrupt circuitry. If one of
this flags (LVIF, HVIF) is set, the outputs are automatically
disabled if the VIS bit in the System Control Register
(SYSCTL) is cleared.
The overvoltage and undervoltage status flags are cleared
(and the outputs reenabled) by writing a “1” to the LVIF / HVIF
flags in the Interrupt Flag Register (IFR) or by a reset.
Clearing this flag has no effect as long as the high voltage or
low voltage condition is still present.
Half-Bridge Status and Control Register (HBSCTL)
CRM — Current Recirculation Mode bit
This read/write bit selects the recirculation mode during
PWM.
Reset clears the CRM bit.
1 = recirculation via switched on low-side MOSFET
0 = recirculation via low-side free wheeling diode
HBxOCF — Half Bridges Overcurrent Flag Bit
This read/write bit indicates that an overcurrent condition
on either the LS or the HS FET on HBx has occurred.
Clear HBxOCF and enable Half Bridge by writing a logic
[1] to HBxOCF. Writing a logic [0] to HBxOCF has no effect.
Reset clears the HBxOCF bit.
1 = overcurrent condition on HBx occurred
0 = no overcurrent condition on HBx
High-Side Drivers
The high-side outputs are low resistive high-side switches,
targeted for driving lamps. The high-sides are protected
against overtemperature, overcurrent and overvoltage/
undervoltage.
Figure 23. HS circuitry
HIGH-SIDE OPERATING MODES
The High-sides outputs are enabled if the PSON bit in the
System Control Register (SYSCTL) is set.
Each high-side output is permanently switched on, if the
HSxON bit in the High-Side Output Register (HSOUT) is set.
PWM control of the output is enabled, if the HSxPWM bit
High-Side Output Register (HSOUT) is set. In this operating
mode the high-side MOSFET is on, if the input PWM signal
(PWM terminal) is high.
The below table shows the behavior of the high-side
MOSFETs depending on the HSONx and PWMHSx bits.
Register Name and Address: HBSCTL - $03
Bit7
6
5
4
3
2
1
Bit0
Read
CRM
0
HB4
OCF
HB3
OCF
HB2
OCF
HB1
OCF
Write
Reset
0
VSUP
HSx
HS - Driver
charge pump
over-current protection
inrush current limiter
PWM
Control
on/off
Current
Limit
Status
PSON
HSxON
HSxPWM
PWM
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MM908E621ACDWB/R2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Quad Half-bridge and Triple High Side with Embedded MCU and LIN for High End Mirror |
| MM908E621ACDWBR2 | 功能描述:8位微控制器 -MCU QUAD HB / TRIPLE HS 841B 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 |
| 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 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 |
| 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 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 |
| MM908E622 | 制造商:FREESCALE 制造商全称: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 |
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