mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 69

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

function is selected. While in reset and immediately out of reset the PU[3:0] pins are configured as a high
impedance input pins. Consult
Module
about pin configurations.
1.4.43
External power and ground for I/O drivers. Bypass requirements depend on how heavily the MCU pins are
loaded.
1.4.44
External power and ground for I/O drivers and input to the internal voltage regulator. Bypass requirements
depend on how heavily the MCU pins are loaded.
1.4.45
Power is supplied to the MCU through VDD and VSS. This 2.5V supply is derived from the internal
voltage regulator. There is no static load on those pins allowed. The internal voltage regulator is turned off,
if VDDR is tied to ground.
1.4.46
VDDA, VSSA are the power supply and ground input pins for the voltage regulator and the analog to
digital converter.
1.4.47
VRH and VRL are the reference voltage input pins for the analog to digital converter.
1.4.48
Provides operating voltage and ground for the Oscillator and the Phased-Locked Loop. This allows the
supply voltage to the Oscillator and PLL to be bypassed independently. This 2.5V voltage is generated by
the internal voltage regulator.
Freescale Semiconductor
(TIM16B4CV1)”, and
VDDX,VSSX — Power & Ground Pins for I/O Drivers
VDDR, VSSR — Power Supply Pins for I/O Drivers & for Internal
Voltage Regulator
VDD1, VDD2, VSS1, VSS2 — Power Supply Pins for Internal Logic
VDDA, VSSA — Power Supply Pins for ATD and VREG
VRH, VRL — ATD Reference Voltage Input Pins
VDDPLL, VSSPLL — Power Supply Pins for PLL
Chapter 3, “Port Integration Module
Chapter 12, “Pulse-Width Modulator (PWM8B6CV1)”
MC9S12E256 Data Sheet, Rev. 1.08
Chapter 1 MC9S12E256 Device Overview (MC9S12E256DGV1)
(PIM9E256V1)”,
Chapter 13, “Timer
for information
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