mm908e622 Freescale Semiconductor, Inc, mm908e622 Datasheet - Page 32

• Manufacturer Part Number: mm908e622
• Description: Mm908e622 Integrated Quad Half-bridge, Triple High-side And Ec Glass Driver With Embedded Mcu And Lin For High End Mirror
• Manufacturer: Freescale Semiconductor, Inc

A0 INPUT AND ANALOG MULTIPLEXER
A0 - Analog Input
analog inputs for potentiometers, NTC, etc.
A0 Current Source
be able to read in switches, NTC, etc. without the need of an
additional supply line for the sensor. The overall enable of
this feature is done by setting the PSON bit in the System
Control register. In addition the terminal has to be selected
with the SS[3:0] bits. The current source can be enabled with
Bit CSON and adjusted with the bits CSSEL[1:0].
be selected (40, 120, 320 and 800µA). This function is
ceased during STOP and SLEEP mode operation.
32
908E622
Functional Device Operation
Operational Modes
ADOUT
Input A0 is an analog input used for reading switches or as
The terminal A0 provides a switchable current source, to
With the CSSEL[1:0] bit’s four different current values can
Source Selection Bits
Multiplexer
Analog
SSx
4
Figure 17. Analog Input and Multiplexer
Analog Port A0/A0CST
CSSEL
CSON
PSON
terminal offers a switchable current source. To read the
Analog Input the terminal has to be selected with the SS[3:0]
bits in the A0MUCTL register.
constant up to an output voltage of ~4.75V.
is foreseen. On this terminal an accurate resistor can to be
connected. Switching the current sources to this resistor
allows the user to measure the current and use the measured
value for calculating the current on A0.
Analog Multiplexer / ADOUT terminal
Analog-to-digital converter of the MCU. To be able to have
different sources for the MCU with one single signal an
A0 is internally connected to the analog multiplexer. This
The current source is derived from the Vdd voltage and is
To calibrate the current sources an extra terminal (A0CST)
The ADOUT terminal is the analog output interface to the
100%
I
A0
(U
VDD
A0
)
Selectable
Current
Source
SS[0:3]
Analog Integrated Circuit Device Data
4.75
Freescale Semiconductor
5
A0CST
U
A0
A0
[V]
1%