mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 70

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 1 MC9S12E256 Device Overview (MC9S12E256DGV1)
70
VDD1, VDD2
VSS1, VSS2
Mnemonic
VDDPLL
VSSPLL
VDDR
VDDX
VSSR
VSSX
VDDA
VSSA
VRH
VRL
All VSS pins must be connected together in the application. Because fast
signal transitions place high, short-duration current demands on the power
supply, use bypass capacitors with high-frequency characteristics and place
them as close to the MCU as possible. Bypass requirements depend on
MCU pin load.
Nominal
3.3/5.0 V
3.3/5.0 V
3.3/5.0 V
3.3/5.0 V
Voltage
2.5 V
2.5 V
0 V
0 V
0 V
0 V
0 V
0V
Table 1-5. MC9S12E256 Power and Ground Connection Summary
Internal power and ground generated by internal regulator. These also allow an external
External power and ground, supply to internal voltage regulator.
External power and ground, supply to pin drivers.
Operating voltage and ground for the analog-to-digital converter, the reference for the
Reference voltage high for the ATD converter, and DAC.
source to supply the core VDD/VSS voltages and bypass the internal voltage regulator.
To disable voltage regulator attach V
internal voltage regulator and the digital-to-analog converters, allows the supply voltage to
the A/D to be bypassed independently.
Reference voltage low for the ATD converter.
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.
MC9S12E256 Data Sheet, Rev. 1.08
NOTE
DDR
Description
to V
SSR
.
Freescale Semiconductor