參數(shù)資料
型號: MM908E624ACDWB/R
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: PLASTIC, SOIC-54
文件頁數(shù): 17/34頁
文件大小: 714K
代理商: MM908E624ACDWB/R
Analog Integrated Circuit Device Data
24
Freescale Semiconductor
908E624
Functional Description
Functional Device Operation
.
Figure 12. High-Side HS1 and HS2 Circuitry
.
Figure 13. High-Side HS3 Circuitry
WINDOW WATCHDOG
The window watchdog is configurable using an external
resistor at the WDCONF terminal. The watchdog is cleared
through by the MODE1:2 bits in the SPI Control register (refer
A watchdog clear is only allowed in the open window. If the
watchdog is cleared in the closed window or has not been
cleared at the end of the open window, the watchdog will
generate a reset on the RST_A terminal and reset the whole
device.
Note
The watchdog clear in Normal request mode
(150 ms) (first watchdog clear) has no window.
Figure 14. Window Watchdog Operation
VSUP2
HSx
High-Side Driver
Charge Pump,
Current Limit Protection,
Overtemperature Protection
Control
On/Off
Status
MODE1:2
HSxON
PWMIN
VSUP2
HS3
High-Side Driver
Charge Pump,
Current Limit Protection,
Overtemperature Protection
Control
On/Off
Status
MODE1:2
HS3ON
Window closed
no watchdog clear allowed
Window open
for watchdog clear
WD timing x 50%
WD period (PWD)
WD timing selected by resistor on WDCONF terminal.
(tPWD)
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