Datasheet

206
4341H–MP3–10/07
AT8xC51SND2C/MP3B
Table 23-3. KBSTA Register
KBSTA (S:A4h) – Keyboard Control and Status Register
Reset Value = 0000 0000b
7 6 5 4 3 2 1 0
KPDE - - - - - - KINF0
Bit Number
Bit
Mnemonic Description
7 KPDE
Keyboard Power Down Enable Bit
Set to enable exit of power down mode by the keyboard interrupt.
Clear to disable exit of power down mode by the keyboard interrupt.
6 - 1 -
Reserved
The value read from these bits is always 0. Do not set these bits.
0 KINF0
Keyboard Input Interrupt Flag
Set by hardware when the KIN0 input detects a programmed level.
Cleared when reading KBSTA.