Buzzer Electric Interface

The electric interface is shown below and the tables that follow show the relevant electrical specifications.

GND

Figure 26: Buzzer Electrical Interface

Figure 26: Buzzer Electrical Interface

Table 20: Interface-MAD and UI Switch

Signal

Parameter

Min

Typ

Max

Unit

BUZZ_PWM Buzzer Control Signal From the MAD

PWM low level, logic low

0

0.2

0.5

V

PWM high level, logic high

2.0

2.5

2.9

V

Current MAD output

2

mA

Buzzer PWM frequency

100

10000

Hz

PWM duty cycle (256 linear steps)

0

100

%

BUZZ_CNT Buzzer Control Signal in the Ul-Switch

PWM low level, logic low

0

0.5

V

PWM high level, logic high

2.00

2.80

2.85

V

Internal Pulldown Resistor

60

100

180

kQ

Table 21: Interface -Ui Switch and buzzer

Signal

Parameter

Min

Typ

Max

Unit

Notes

VBAT

Supply Voltage

3

3.6

5.2

V

GND

Ground

0

V

BUZZER

Buzzer Average Current

90

mA

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