PBA31308V2.02SLJYU 데이터 시트보기 (PDF) - Unspecified

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PBA31308V2.02SLJYU

UniStone BlueMoon™ Universal Platform

Unspecified 

Intel Public

2

Basic Operating Information

UniStone

PBA 31308

Basic Operating Information

2.1

Power Supply

UniStone is supplied from a single supply voltage VSUPPLY. This supply voltage must always be present. The

UniStone chip is supplied from an internally generated 2.5 V supply voltage. This voltage can be accessed from

the VREG pin. This voltage may not be used for supplying other components in the host system but can be used

for referencing the host interfaces.

The PCM interface and the UART interface are supplied with dedicated, independent, reference levels via the

VDDPCM and VDDUART pins. All other digital I/O pins are supplied internally by either 2.5 V (Internal2) or 1.5

V(Internal1). Section 1.4 provides a mapping between pins and supply voltages.

The I/O power domains (VDDPCM and VDDUART) are completely separated from the other power domains and

can stay present also in low power modes.

2.2

Clocking

UniStone has one clock input CLK32 that is optional. If used this 32.768 kHz clock must always be present to

assist UniStone to keep the time in low power modes.

The low power clock can be generated internally by the crystal oscillator and/or the low power oscillator or provided

externally.

Product Overview

14

Revision 1.2, 2009-02-17

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