AS3709 datasheet(54/74 Pages) AMSCO

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AS3709 – 54

ams Datasheet, Confidential: 2013-Aug [1-02]

Re g i st e r De sc rip t ion

Figure 73:

Supply_voltage_monitor Register (Address 32h)

Addr: 32h

Supply_voltage_monitor

Bit

Bit Name

Default

Access

Bit Description

7FastResEn

0 : ResVoltFall debounce time = 3msec

1 : ResVoltFall debounce time = 4μsec (tbd)

6SupResEn

0 : A reset is generated if VSUP falls below 2.7V **

1 : A reset is generated if VSUP falls below ResVoltFall

** If VSUP falls below ResVoltFall only an interrupt is

generated (if enabled) and the μProcessor can shut

down the system

5:3

ResVoltFall

'b000

This value determines the reset level ResVoltFall for

falling VSUP. It is recommended to set this value at least

200mV lower than ResVoltRise (the levels differ

between 3.3V and 5V supply)

0 : 2.7V / 3.6V

1 : 2.8V / 3.7V

2 : 2.9V / 3.8V

3 : 3.0V / 3.9V

4 : 3.1V / 4.0V

5 : 3.2V / 4.1V

6 : 3.3V / 4.2V

7 : 3.4V / 4.4V

2:0

ResVoltRise

'b000

RO (OTP)

This value determines the reset level ResVoltRise for

rising VSUP. It is recommended to set this value at least

200mV higher than ResVoltFall (the levels differ

between 3.3V and 5V supply)

0 : 2.7V / 3.6V

1 : 2.8V / 3.7V

2 : 2.9V / 3.8V

3 : 3.0V / 3.9V

4 : 3.1V / 4.0V

5 : 3.2V / 4.1V

6 : 3.3V / 4.2V

7 : 3.4V / 4.4V

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