ak4184a AKM Semiconductor, Inc., ak4184a Datasheet - Page 32

• Manufacturer Part Number: ak4184a
• Description: Tsc With Keypad Scanner And Gpio Expander
• Manufacturer: AKM Semiconductor, Inc.

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1. Host Scan
MS0947-E-00
Keypad Scanner Flowchart
Figure 20. Keypad scanner sequence initiated by Host command
No
Debouncing keys
Store scan results
in KPDATA1, 2
KEYIRQN pin
KEYIRQN pin
KPScanInitiate
KPDATA1,2
Start Clock
BUSY pin
Stop Clock
BUSY pin
Scanning &
Register
Register?
Register
Keypad
Touch
Write
High
Low
High
Done
Start
Read
Low
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Yes
[AK4184A]
2008/04