PC87591L datasheet(63/437 Pages) NSC

63 / 437 page

3.0 Power, Reset and Clocks (Continued)

Revision 1.07

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The following table summarizes the power states described in relation with the PC87591x power planes.

Figure 10 shows the power state transitions.

Figure 10. Power State Transitions

3.1.3

Power Connection and Layout Guidelines

The PC87591x requires a power supply voltage of 3.3V

± 10% for all the digital supplies (V

CC and VDD). The analog power

supply requires a voltage of 3.3V

± 10% or 3.3V ± 5%. A 3.3V ± 5% analog supply is recommended since it improves the

accuracy of measuring input voltage values close to the full-scale (see Section 7.4.1 on page 378).

Table 11. PC87591x Power States and Related Power Planes

Power State

Host Domain

(VDD)

Suspend

(VCC)

Analog

(AVCC)

Battery

Backed

(VPP)

VBAT

Battery Fail

Power Fail

Power Applied

Active and Idle

Host Power Off

Host Power On

Illegal1

1. Operation is not guaranteed.

VBAT Off and VCC Off (VPP Off)

Battery Fail

Power Fail

Host

Power Off

Host

Power On

Active

Idle

VBAT On (VPP On)

and VCC Off

VCC On and

VCC On

VCC On and

VDD Off

VDD On

Hardware

Event

VCC On and

VDD On

VCC On

VDD On

Power Applied

(VCC On)

VBAT On (VPP On)

and VCC Off

Core Domain

Host Domain

Active

with WAIT

Software

Controlled

Hardware

Event

Software

Controlled

VDD Off

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