MC9S12HY64 Datasheet, PDF (45/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Device Overview MC9S12HY/HA-Family
1.7.4.6 VDDM[2:1] / VSSM[2:1]— Power Supply Pins for Motor 0 to 3
External power supply pins for the Port U and Port V. VDDM2 and VDDM1 as well as VSSM2 and
VSSM1 are internal connected together.
1.7.4.7 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 change the
display contrast.
1.7.4.8
Power and Ground Connection Summary
Table 1-9. Power and Ground Connection Summary
Mnemonic
Nominal
Voltage
Description
VDDR
VDDX
VSSX
VDDA/VRH
VSSA/VRL
VSS3
VSSPLL
VDDM[2:1]
VSSM[2:1]
VLCD
5.0 V
5.0 V
0V
5.0 V
0V
0V
0V
5.0 V
0V
5.0 V
External power supply to internal voltage
regulator
External power and ground, supply to pin
drivers
Operating voltage and ground for the
analog-to-digital converters and the
reference for the internal voltage regulator,
allows the supply voltage to the A/D to be
bypassed independently.AlsorReference
voltages for the analog-to-digital converter.
Internal power and ground generated by
internal regulator for the internal core.
Provides operating voltage and ground for
the phased-locked loop. This allows the
supply voltage to the PLL to be bypassed
independently. Internal power and ground
generated by internal regulator.
External power and ground, supply to Port
U/V motor drivers
External voltage reference for the LCD
driver
1.8 System Clock Description
For the system clock description please refer to chapter Chapter 7, “S12 Clock, Reset and Power
Management Unit (S12CPMU) Block Description. For the LCD IRCCLK in Table 18-8. LCD Clock and
Frame Frequency, it is always connected to the internal 1MHZ RC output.
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
45