mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 444

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Supply Voltage Sensor - (BATSV2)
16.1.3
Figure 16-1
channel.
16.2
This section lists the name and description of all external ports.
16.2.1
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
444
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.
External Signal Description
Block Diagram
VSENSE — Supply (Battery) Voltage Sense Pin
shows a block diagram of the BATS module. See device guide for connectivity to ADC
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
BVLS[1:0]
BSESE
BVHS
MC9S12VR Family Reference Manual,
Preliminary - Subject to Change Without Notice
Figure 16-1. BATS Block Diagram
1
BSEAE
BVLC
Comparator
VSENSE
BVHC
BSUAE
Rev. 2.2
2
BSUSE
to ADC
VSUP
Freescale Semiconductor