ak4184 AKM Semiconductor, Inc., ak4184 Datasheet - Page 32

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

L
1. Host Scan
MS0603-E-00
Keypad Scanner Flowchart
Figure 19. 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
Done
Start
High
Read
Low
32
Yes
2007/04
[AK4184]