13892 datasheet(48/158 Pages) FREESCALE

48 / 158 page

FUNCTIONAL DEVICE OPERATION

I2C INTERFACE

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC13892

SPECIFIC REGISTERS

IDENTIFICATION

The MC13892 parts can be identified though identification bits which are hardwired on chip.

The version of the MC13892 can be identified by the ICID[2:0] bits. This is used to distinguish future derivatives or

customizations of the MC13892. The bits are set to ICID[2:0] = 111 and are located in the revision register.

The revision of the MC13892 is tracked with the revision identification bits REV[4:0]. The bits REV[4:3] track the full mask set

revision, where bits REV[2:0] track the metal revisions. These bits are hardwired.

The bits FIN[3:0] are Freescale use only and are not to be explored by the application.

The MC13892 die is produced using different wafer fabrication plants. The plants can be identified via the FAB[1:0] bits. These

bits are hardwired.

MEMORY REGISTERS

The MC13892 has a small general purpose embedded memory of two times 24-bits to store critical data. The data is

maintained when the device is turned off and when in a power cut. The contents are only reset when a RTC reset occurs, see

Clock Generation and Real Time Clock.

Table 13. Additional Sense Bits

Sense

Description

Section

MODES[1:0]

00 = MODE grounded

10 = MODE to VCOREDIG

11 = MODE to VCORE

page 40

PUMSxS[1:0]

00 = PUMS grounded

01 = PUMS open

10 = PUMS to VCOREDIG

11 = PUMS to VCORE

page 54

CHRGSSS

0 = Single path

1 = Serial path

page 89

Table 14. IC Revision Bit Assignment

Bits REV[4:0]

IC Revision

10001

Pass 3.1

13892 Datasheet(PDF) 48 Page - Freescale Semiconductor, Inc

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