參數(shù)資料
型號(hào)： MM908E625ACPEK
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： FLASH, 32 MHz, MICROCONTROLLER, PDSO54
封裝： 5.10 X 10.30 MM, 0.65 MM PITCH, LEAD FREE, SOIC-54
文件頁(yè)數(shù)： 19/49頁(yè)
文件大?。?/td> 965K
代理商： MM908E625ACPEK
Analog Integrated Circuit Device Data
26
Freescale Semiconductor
908E625
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
POWER OUTPUT REGISTER (POUT)
Current Source Select Bits (CSSEL0:CSSEL1)
These read/write bits select the current source values.
Reset clears the CSSEL0:CSSEL1 bits.
Current Source Enable Bit (CSEN)
This read/write bit enables the current source for PA1.
Reset clears the CSEN bit (Table 9).
HVDD On Bit (HVDDON)
This read/write bit enables HVDD output. Reset clears the
HVDDON bit.
1 = HVDD enabled
0 = HVDD disabled
Lamp Driver On Bit (HS_ON)
This read/write bit enables the Lamp driver. Reset clears
the HS_ON bit.
1 = Lamp driver enabled
0 = Lamp driver disabled
Hall-Effect Sensor Input Pins (H1:H3)
Function
The Hall-effect sensor input pins provide three inputs for
two-pin Hall-effect sensors for detecting stall and position or
reading Hall-effect sensor contact switches. The Hall-effect
sensor input pins are not influenced by the PSON bit in the
System Control Register.
Each pin of the Hall-effect sensor can be enabled by
setting the HxEN bit in the Hall-effect sensor input pin control
register (HACTL). If the pins are enabled, the Hall-effect
sensors are supplied with VSUP voltage and the sense
circuitry is working. An internal clamp circuity limits the supply
voltage to the sensor to 15 V. This sense circuitry monitors
the current to VSS. The result of this sense operation is given
by the HxF flags in the Hall-effect sensor input pin status
register (HASTAT).
The flag is set if the sensed current is higher than IHSCT.
To prevent noise on this flag, a hysteresis is implemented on
these pins.
After switching on the Hall-effect sensor input pins (HxEN
= 1), the Hall-effect sensors need some time to stabilize the
output. In RUN mode the software must wait at least 40
s
between enabling the Hall-effect sensor and reading the hall
flag.
The Hall-effect sensor input pin works in an dynamic
output voltage range from VSUP down to 2.0 V. Below 2.0 V
the hallflags are not functional anymore. If the output voltage
is below a certain threshold, the Hall-effect sensor input pin
over-current flag (HP_OCF) in the system status register is
set.
Figures 13 through 15 illustrate the connections to the
Hall-effect input sensors.
Register Name and Address: POUT - $0b
Bits
7
6
5
4
3
2
1
0
Read
0
CSSEL1 CSSEL0 CSEN
HVDDON HS_ON
Write
Reset
0
Notes
16.
This bit must always be set to 0.
Table 9. PA1 Current Source Enable Bit
CSEN
Current Source Enable
0
Current Source Off
1
Current Source On
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