Automatic wakeup circuit, Figure 8. automatic wakeup circuit, An186 – Cirrus Logic AN186 User Manual

Page 11: Unused gpio pin

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AN186

AN186REV1

11

9. AUTOMATIC WAKEUP CIRCUIT

U2

1

2

3

C1
0.1uF

Unused

GPIO pin

R2
47k

R1

47k

U1A

1

2

14

7

74LCX02

WAKEUP

74LCX14

Vdd

WAKEUP_DIS

Figure 8. Automatic Wakeup Circuit

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