SMBP2501BPB datasheet(40/107 Pages) SONIX

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SN8P2501B

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 40

Version 2.1

086H

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PFLAG

NT0

NPD

LVD36

LVD24

Read/Write

R/W

After reset

Bit 5

LVD36: LVD 3.6V operating flag and only support LVD code option is LVD_H.

0 = Inactive (VDD > 3.6V).

1 = Active (VDD <= 3.6V).

Bit 4

LVD24: LVD 2.4V operating flag and only support LVD code option is LVD_M.

0 = Inactive (VDD > 2.4V).

1 = Active (VDD <= 2.4V).

LVD

LVD Code Option

LVD_L

LVD_M

LVD_H

2.0V Reset

Available

2.4V Flag

Available

2.4V Reset

Available

3.6V Flag

Available

LVD_L

If VDD < 2.0V, system will be reset.

Disable LVD24 and LVD36 bit of PFLAG register.

LVD_M

If VDD < 2.0V, system will be reset.

Enable LVD24 bit of PFLAG register. If VDD > 2.4V, LVD24 is

“0”. If VDD <= 2.4V, LVD24 flag is “1”.

Disable LVD36 bit of PFLAG register.

LVD2_H

If VDD < 2.4V, system will be reset.

Enable LVD24 bit of PFLAG register. If VDD > 2.4V, LVD24 is “0”. If VDD <= 2.4V, LVD24 flag is “1”.

Enable LVD36 bit of PFLAG registe

r. If VDD > 3.6V, LVD36 is “0”. If VDD <= 3.6V, LVD36 flag is “1”.



Note:

After any LVD reset, LVD24, LVD36 flags are cleared.

The voltage level of LVD 2.4V or 3.6V is for design reference only. Don’t use the LVD indicator

as precision VDD measurement.

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