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Chapter 2: MAX II Architecture

MultiVolt Core

MAX II Device Handbook

Altera Corporation

MultiVolt Core

The MAX II architecture supports the MultiVolt core feature, which allows MAX II

devices to support multiple VCC levels on the VCCINT supply. An internal linear voltage

regulator provides the necessary 1.8-V internal voltage supply to the device. The

voltage regulator supports 3.3-V or 2.5-V supplies on its inputs to supply the 1.8-V

internal voltage to the device, as shown in Figure 2–18. The voltage regulator is not

guaranteed for voltages that are between the maximum recommended 2.5-V

operating voltage and the minimum recommended 3.3-V operating voltage.

The MAX IIG and MAX IIZ devices use external 1.8-V supply. The 1.8-V VCC external

supply powers the device core directly.

Figure 2–17. EPM570, EPM1270, and EPM2210 UFM Block LAB Row Interface

RTP_BUSY

BUSY

OSC

DRDout

DRDin

PROGRAM

ERASE

OSC_ENA

ARCLK

ARSHFT

DRDCLK

DRDSHFT

ARDin

UFM Block

CFM Block

LAB

Figure 2–18. MultiVolt Core Feature in MAX II Devices

MAX II Device

3.3-V or 2.5-V on

VCCINT Pins

Voltage

Regulator

1.8-V Core

Voltage

MAX IIG or MAX IIZ Device

1.8-V on

VCCINT Pins

1.8-V Core

Voltage

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