Datasheet

Tire Pressure Monitoring Sensor SP30

TS

Rev.

Page

of

1085

5

8

14

2.5

Clock sources

2.5.1

System clock (MCLK)

Table 11 System clock (MCLK) specifications

SPECIFICATION

AMBIENT CONDITIONS

PARAMETER

Min

Typ

Max

Unit

TEMP [°C]

VDD [V]

COMMENTS

MCLK frequency

1.8

2.0

2.2

MHz

-40 to 125

2.1 3.6

2.5.2

Low Power (LP) oscillator

Table 12 LP oscillator specifications

SPECIFICATION

AMBIENT CONDITIONS

PARAMETER

Min

Typ

Max

Unit

TEMP [°C]

VDD [V]

COMMENTS

0.5, 1.0, 2.0 or 4.0

s

-40 to 125

2.1 to 3.6

Interval timer main tick

25, 50, 75 or 100

ms

-40 to 125

2.1 to 3.6

Delay to extra tick

LP oscillator accuracy

-20

20

%

-40 to 125

2.1 to 3.6

2.5.3

External clock

Table 13 External clock specifications

SPECIFICATION

AMBIENT CONDITIONS

PARAMETER

Min

Typ

Max

Unit

TEMP [°C]

VDD [V]

COMMENTS

External clock

3.5

MHz

-40 to 125

2.1 to 3.6

2.6

LF input

Table 14 LF telegram

SPECIFICATION

AMBIENT CONDITIONS

PARAMETER

Min

Typ

Max

Unit

TEMP [°C]

VDD [V]

COMMENTS

Modulation

ASK

-40 to 125

2.1 to 3.6

Carrier frequency

121.25

125

128.75

kHz

-40 to 125

2.1 to 3.6

Preamble period

4

ms

-40 to 125

2.1 to 3.6

Data rate

3.84

3.9

3.96

kHz

-40 to 125

2.1 to 3.6

Settling time

2

ms

-40 to 125

2.1 to 3.6 Time from LF interface

is turned on by RISC to

the LF interface is

active

Detection threshold

5

mVp-p

-40 to 125

2.1 to 3.6

Input capacitance

10

12

pF

-40 to 125

2.1 to 3.6

Input resistance

500

k

Ω

-40 to 125

2.1 to 3.6

Other

The input signals from the enabled LF channels are rectified and real time summed