Chapter 1 Device Overview MC9S12ZVHY/MC9S12ZVHL Families
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
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1.7.5.4
VLCD- Power Supply Reference Pin for LCD driver
VLCD is the voltage reference pin for the LCD driver. Adjusting the voltage on this pin will chan1ge the
display contrast.
1.7.5.5
VSS1, VSS2 — Core Ground Pin
The VDD voltage supply of nominally 1.8V is generated by the internal voltage regulator. The return
current path is through the VSS1 and VSS2 pin.
1.7.5.6
VSUP — Voltage Supply Pin for Voltage Regulator
VSUP is the 12V supply voltage pin for the on chip voltage regulator. This is the voltage supply input from
which the voltage regulator generates the on chip voltage supplies. It must be protected externally against
a reverse battery connection.VLINSUP is connected to VSUP on this device
1.8
Package and Pinouts
The MC9S12ZVHY/MC9S12ZVHL Families will be offered in 100 pin and 144 pin LQFP packages.