User`s guide

Architecture
AT85C51SND3Bx Firmware User’s Guide 5-33
7691A–MP3–08/07
Figure 5-9 gives a graphical representation of the keypad behavior.
Figure 5-9. Keyboard timings and events
Figure 5-10. Example of a key processing in MMI applications
Key
Events
➀ ➀
➁
➊ ➋
➁
➊
➀
➀
➎
➂
➌ ➌
➂
➌
➂
➌
➂
➌
➂
➌
➂
➌
➂
➌
➍
➃
Timings Tags:
➀ KBD_DEBOUNCE_TIMING
➁ KBD_REPEAT_START_TIME
➂ KBD_REPEAT_CONT_TIME
➃ KBD_REPEAT_LONG_TIME
Events Tags:
➊ KBD_KEY_PRESSED
➋ KBD_KEY_RELEASED
➌ KBD_KEY_REPEAT
➍ KBD_KEY_LONGPRESSED
➎ KBD_KEY_REPEAT_RELEASED