參數(shù)資料
型號: MM908E621ACDWB/R2
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: 17.90 X 7.50 MM, 0.65 MM PITCH, PLASTIC, SOIC-54
文件頁數(shù): 38/65頁
文件大小: 1221K
代理商: MM908E621ACDWB/R2
Analog Integrated Circuit Device Data
Freescale Semiconductor
43
908E621
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Figure 24. Inrush Current Limitation on HS Outputs
High Side Current Recopy
Each High Side has an additional sense output to allow a
current recopy feature. This sense source is internally
connected to a shunt resistor. The drop voltage is amplified
and switched to the Analog Multiplexer.
Switchable HVDD Outputs
The HVDD pin is a switchable 5V output pin. It can be used
for driving external circuitry, which requires a 5V voltage. The
output is enabled with the PSON bit in the System Control
register, and can be switched on / off with the HVDD_ON bit
in the High Side Out register. Low or high voltage conditions
(LVIF / HVIF) will have no influence on this circuitry.
HVDD Over-temperature Protection
The output is protected against over-temperature
conditions.
HVDD Over-current Protection
The HVDD output is protected against over-current. In
case the current reaches the over-current limit, the output
current will be limited, and the HVDDOCF over-current flag in
the System Status register is set.
HIGH SIDE OUT REGISTER (HSOUT)
HVDD-ON — HVDD On Bit
This read/write bit enables the HVDD output.
Reset clears HVDDON bit.
1 = HVDD enabled
0 = HVDD disabled
HSxON — High Side on/off Bits
These read/write bits turn on the High Side Fet’s
permanently. Reset clears the HSxON bits.
1 = High Side x is turned on
0 = High Side x is turned off
HS Current
HS Over-current Shutdown Threshold
PWM Pin
t
Register Name and Address: HSOUT - $02
Bit7
6
5
4
3
2
1
Bit0
Read
HVDD
ON
0
HS3P
WM
HS2P
WM
HS1P
WM
HS3O
N
HS2O
N
HS1O
N
Write
Reset
0
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