Datasheet

Analog Integrated Circuit Device Data
111 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.
9 Reserved 25 Regulator 2 & 3 Voltage 41 Unused 57 Unused
10 Reserved 26 Regulator 4 A/B Voltage 42 Unused 58 Unused
11 Reserved 27 Regulator 5 Voltage 43 ADC 0 59 Unused
12 Unused 28 Regulator 1 & 2 Mode 44 ADC 1 60 Unused
13 Power Control 0 29 Regulator 3, 4 and 5 Mode 45 ADC 2 61 Unused
14 Power Control 1 30 Regulator Setting 0 46 ADC 3 62 Unused
15 Power Control 2 31 SWBST Control 47 ADC4 63 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
Register Register Register Register