ak4184a AKM Semiconductor, Inc., ak4184a Datasheet - Page 33
ak4184a
Manufacturer Part Number
ak4184a
Description
Tsc With Keypad Scanner And Gpio Expander
Manufacturer
AKM Semiconductor, Inc.
Datasheet
1.AK4184A.pdf
(36 pages)
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2. Keypress scan mode
MS0947-E-00
Figure 21. 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
High
Low
High
Done
Start
Read
Low
- 33 -
Yes
[AK4184A]
2008/04
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