Chapter 22 Supply Voltage Sensor - (BATSV2)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
742
Freescale Semiconductor
During stop mode operation the path from the VSUP pin through the resistor chain to ground is
opened and the low voltage sense features are disabled.
The content of the configuration register is unchanged.
22.1.3
Block Diagram
shows a block diagram of the BATS module. See device guide for connectivity to ADC
channel.
Figure 22-1. BATS Block Diagram
22.2
External Signal Description
This section lists the name and description of all external ports.
22.2.1
VSENSE — Supply (Battery) Voltage Sense Pin
This pin can be connected to the supply (Battery) line for voltage measurements. The voltage present at
this input is scaled down by an internal voltage divider, and can be routed to the internal ADC or to a
VSENSE
to ADC
...
BVLC
BVHC
VSUP
...
BSEAE
BSUAE
BSESE
BSUSE
BVHS
BVLS[1:0]
Comparator
1 automatically closed if BSESE and/or BSEAE
is active, open during Stop mode
2 automatically closed if BSUSE and/or BSUAE
is active, open during Stop mode
1
2