ZL40272 datasheet(21/54 Pages) MICROCHIP

21 / 54 page



2020 - 2021 Microchip Technology Inc. and its subsidiaries

DS20006408B-page 21

ZL40272

3.0

The device is controlled by accessing registers through the serial interface. The following table provides a summary of

the registers available for the configuration of the device. The default settings can be modified via factory programmable

OTP memory.

TABLE 3-1:

Address

I2C A[6:0]

Hex (0x)

Name

Data D[7:0]

XTALBG

xtal_buf_gain[7:0]

XTALDL

xtal_drive_level[7:0]

XTALLC

xtal_load_cap[7:0]

XTALNR

xtal_normal_run

OUTLOWALL

out_low_all

INSEL

input_select[1:0]

—

Not used.

DRVTYPE0

driver_type[7:0] (differential output OUT3, OUT2, OUT1, OUT0)

DRVTYPE1

driver_type[15:8] (differential output OUT7, OUT6, OUT5, OUT4)

DRVTYPE2

driver_type[23:16] (differential output OUT11, OUT10, OUT9, OUT8)

OUTLOW0

output_drive_low[7:0]

OUTLOW1

output_drive_low[11:8]

COMMODSEL

vcm_sel

—

Not used.

DEVADDR

dev_addr[2:0]

Reserved

DEVICEID

Device Identification

12-1F

Reserved

TABLE 3-2:

0X00 XTALBG - XTAL BUFFER GAIN

Bit

Name

Description

Type

Reset

7:0

xtal_buf_gain[7:0]

Programs crystal buffer (inverting amplifier) gain.

Every bit pair (bits: 01, 23, 45, 67) of this register corre-

spond to additional equal gain block which can be added

(bits set) or removed (bits cleared).

Minimum gain is 0x00 (default) and 0xFF is maximum

gain

When reference input mode is “bypass XTAL mode” or

“differential input modes” with HIGH xtal_normal_run bit,

the buffer is disabled and follows “Input Selection”.

When xtal_normal_run bit is LOW, XTAL buffer is in the

“xtal forced run” mode and keep running.

8’b0000_0000: default crystal buffer strength.

8’b0000_0011: enable additional buffer strength

8’b0000_1100: enable additional buffer strength

8’b0011_0000: enable additional buffer strength

8’b1100_0000: enable additional buffer strength

ZL40272 Datasheet(PDF) 21 Page - Microchip Technology

ZL40272 Datasheet(HTML) 21 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL