參數(shù)資料
型號(hào)： 908E425
廠商： 飛思卡爾半導(dǎo)體(中國(guó))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(yè)數(shù)： 25/49頁(yè)
文件大?。?/td> 490K
代理商： 908E425
Analog Integrated Circuit Device Data
Freescale Semiconductor
25
908E425
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Table 7. Analog Multiplexer Configuration Register
ANALOG INPUT PA1
The Analog input PA1 pin provides an input for reading
analog signals and is internally connected to the analog
multiplexer. It can be used for reading switches,
potentiometers or resistor values, etc.
ANALOG INPUT PA1 CURRENT SOURCE
The analog input PA1 has an additional selectable current
source. It enables the reading of switches, NTC, etc., without
the need of an additional supply line for the sensor illustrated
in
Figure 12
. With this feature it is also possible to read
multiple switches on one input.
Current source is enabled if the PSON bit in the System
Control Register (SYSCTL) and the CSEN bit in the Power
Output Register (POUT) is set.
Four different current source values can be selected with
the CSSELx bits shown in
Table 8
. This function ceases
during STOP mode operation.
Table 8. PA1 Current Source Level Selection Bits
Figure 12. Analog Input PA1 and Multiplexer
SS3
SS2
SS1
SS0
Channel
0
0
0
0
Current Recopy HB1
0
0
0
1
Current Recopy HB2
0
0
1
0
Current Recopy HB3
0
0
1
1
Current Recopy HB4
0
1
0
0
V
SUP
Prescaler
0
1
0
1
Temperature Sensor
0
1
1
0
Not Used
0
1
1
1
PA1 Pin
1
0
0
0
Not Used
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
CSSEL1 CSSEL0
Current Source Enable (typ.)
0
0
10%
0
1
30%
1
0
60%
1
1
100%
Analog
Multiplexer
ADOUT
NTC
PSON
CSEN
CSSEL
SSx
3
Source Selection Bits
VDD
PA1
Analog Input PA1
Selectable
Current
Source
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