ak4184 AKM Semiconductor, Inc., ak4184 Datasheet - Page 33

• Manufacturer Part Number: ak4184
• Description: Tsc With Keypad Scanner And Gpio Expander
• Manufacturer: AKM Semiconductor, Inc.

2. Keypress scan mode
MS0603-E-00
Figure 20. Keypad scanner sequence initiated by key press
No
Debouncing keys
Store scan results
in KPDATA1, 2
KEYIRQN pin
KEYIRQN pin
KPDATA1,2
Start Clock
BUSY pin
Stop Clock
BUSY pin
Scanning &
Register
Register?
Keypad
Touch
Low
Done
High
High
Start
Read
Low
Yes
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[AK4184]