908E625_10 Datasheet, PDF (26/49 Pages) Freescale Semiconductor, Inc – Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Table 7. Analog Multiplexer Configuration Register
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
0
1
0
1
V_SUP Prescaler
Temperature Sensor
0
1
1
0
Not Used
0
1
1
1
PA1 Pin
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
Not Used
1
1
0
1
1
1
1
0
1
1
1
1
Source Selection Bits
SSx
3
ADOUT
Analog
Multiplexer
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
CSSEL1 CSSEL0
Current Source Enable (typ.)
0
0
0
1
1
0
1
1
10%
30%
60%
100%
CSSEL
PSON
CSEN
VDD
Selectable
Current
Source
Analog Input PA1
PA1
NTC
908E625
26
Figure 12. Analog Input PA1 and Multiplexer
Analog Integrated Circuit Device Data
Freescale Semiconductor