9.0

LF TIMING PULSE: PULSE PERIOD

Line

Parameter

Test Condition

Value

Unit

9.1

LF pulse period

Sync counter setting. User programmable register.

Sync ratio at power up: 4096

2 to 4096

Sync.

ratio

9.2

LF pulse period

LF timing pulse period = oscillator period * ripple * sync

0.2 to

26214.4

µs

-----

10.0

LF TIMING PULSE: ENABLE SETTING

Line

Parameter

Test Condition

Value

Unit

10.1

LF output off

SPI or bonded in paralled to RF enable

0

10.2

LF output on

SPI or bonded in paralled to RF enable

1

-----

11.0

COUNTER

Line

Parameter

Test Condition

Value

Unit

11.1

32 bit timer

Continuous count of LF, reset on power up, read via SPI

Default: 0. Maximum: 2³²-1 LF counts

11.2

32 bit min. rollover

period

(2³²-1) x LF period

859 min

sec

11.3

32 bit max. rollover

period

(2³²-1) x LF period

1303 max

day

-----

12.0

ALARM

Line

Parameter

Test Condition

Value

Unit

12.1

32 bit match

Set via SPI which also resets alarm output when set. User

programmable register.

Default: 0. Maximum: 2³²-1

12.2

Alarm dedicated

output

Alarm latched when match detector matches timer.

Power up default: 1 (Note 4)

0 to 1

Alarm

high

-----

13.0

FREQUENCY CHARACTERISTICS (DAC)

Line

Parameter

Test Condition

Value

Unit

13.1

Frequency min. shift

At 0 - relative to DAC 128

-5 to -10

ppm

13.2

Frequency nominal

shift

At 0 - relative to DAC 128

-7 to -15

ppm

13.3

Frequency max. shift

At 0 - relative to DAC 128

-10 to -20

ppm

13.4

Frequency min. shift

At 255 - relative to DAC 128

5 to 10

ppm

13.5

Frequency nominal

shift

At 255 - relative to DAC 128

7 to 15

ppm

13.6

Frequency max. shift

At 255 - relative to DAC 128

10 to 20

ppm

13.7

Frequency change per

bit

Frequency (DAC 255 – DAC 0) / 256

Nominal value 0.08 ppm

0.04 to 0.2

ppm

-----

14.0

STANDARD 4 WIRE SPI INTERFACE (CPOL 0, CPHA 0 MODE)

Line

Parameter

Description

14.1

Diagram

Refer to standard 4 wire SPI interface diagram

14.2

Digital control and LF

output

Digital control specification available on request

-----

15.0

MARKING

Line

Parameter

Description

15.1

Type

Laser marked

15.2

Line 1

R and manufacturing identifier (X YW) (see model drawing)

15.3

Line 2

Pad 1 / static sensitivity identifier (Δ), abbreviated part number (0000), device date code

(YW) (see model drawing)

-----

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