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參數(shù)資料
| 型號： | 908E425 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication |
| 中文描述： | 綜合四半僅符合電源橋，嵌入式微控制器和LIN串行通信 |
| 文件頁數(shù)： | 23/49頁 |
| 文件大?。?/td> | 490K |
| 代理商： | 908E425 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
23
908E425
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
RESET
The 908E425 chip has four internal reset sources and one
external reset source, as explained in the paragraphs below.
Figure 11
depicts the internal reset sources.
RESET INTERNAL SOURCES
AUTONOMOUS WATCHDOG
AWD modules generates a reset because of a timeout
(watchdog function).
HIGH-TEMPERATURE RESET
To prevent damage to the device, a reset will be initiated if
the temperature rises above a certain value. The reset is
maskable with bit HTRE in the Reset Mask Register. After a
reset the high-temperature reset is disabled.
LOW-VOLTAGE RESET
The LVR is related to the internal V
DD
. In case the voltage
falls below a certain threshold, it will pull down the
RST_A
pin.
Figure 11. Internal Reset Routing
HIGH-VOLTAGE RESET
The HVR is related to the external V
SUP
voltage. In case
the voltage is above a certain threshold, it will pull down the
RST_A
pin. The reset is maskable with bit HVRE in the Reset
Mask Register. After a reset the high-voltage reset is
disabled.
RESET
EXTERNAL SOURCE
EXTERNAL RESET PIN
The microcontroller has the capability of resetting the
SMARTMOS
device by pulling down the
RST
pin.
RESET MASK REGISTER (RMR)
HIGH-TEMPERATURE RESET TEST (TTEST
)
This read / write bit is for test purposes only. It decreases
the overtemperature shutdown limit for final test. Reset clears
the TTEST bit.
1 = Low-temperature threshold enabled
0 = Low-temperature threshold disabled
HTRE Flag
HVRE Flag
AWDRE Flag
AWD Reset
Sensor
High-Voltage
Reset Sensor
High-Temperature
Reset Sensor
MONO
FLOP
Low-Voltage Reset
VDD
RST_A
SPI REGISTERS
Register Name and Address: RMR - $06
Bits
7
6
5
4
3
2
1
0
Read
TTEST
0
0
0
0
0
HVRE HTRE
Write
Reset
0
0
0
0
0
0
0
0
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