34708 datasheet(113/159 Pages) FREESCALE

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Analog Integrated Circuit Device Data

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113

Freescale Semiconductor

MC34708

Functional Block Description

7.10.2 Specific Registers

7.10.2.1 IC and Version Identification

The IC and other version details can be read via the identification bits. These are hardwired on the chip and described in

Table 102.

7.10.2.2 Embedded Memory

There are four register banks of general purpose embedded memory to store critical data. The data written to MEMA[23:0],

MEMB[23:0], MEMC[23:0], and MEMD[23:0] is maintained by the coin cell when the main battery is deeply discharged, removed,

or contact-bounced (i.e., during a power cut). The contents of the embedded memory are reset by RTCPORB. A known pattern

can be maintained in these registers to validate confidence in the RTC contents when power is restored after a power cut event.

Alternatively, the banks can be used for any system need for bit retention with coin cell backup.

Reserved

Regulator 2 & 3 Voltage

Unused

Reserved

Regulator 4 A/B Voltage

Unused

Reserved

Regulator 5 Voltage

ADC 0

Unused

Regulator 1 & 2 Mode

ADC 1

Unused

Power Control 0

Regulator 3, 4 and 5 Mode

ADC 2

Unused

Power Control 1

Regulator Setting 0

ADC 3

Unused

Power Control 2

SWBST Control

ADC4

Unused

Table 102. IC Revision Bit Assignment

Identifier

Value

Purpose

FULL_LAYER_REV[2:0]

XXX Represents the full layer revision

• Pass 2.4 = 010

METAL_LAYER_REV[2:0]

XXX Represents the metal layer revision

• Pass 2.4 = 100

FIN[2:0]

000

FIN version

• Pass 2.4 = 000

FAB[2:0]

000

FAB Version

• Pass 2.4 = 000

Table 101. Register Set

34708 Datasheet(PDF) 113 Page - Freescale Semiconductor, Inc

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