AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 180

• Manufacturer Part Number: AT83C51SND1C_03
• Description: Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
• Manufacturer: ATMEL [ATMEL Corporation]

Registers
180
AT8xC51SND1C
Table 151. KBCON Register
KBCON (S:A3h) – Keyboard Control Register
Reset Value = 0000 1111b
Table 152. KBSTA Register
KBSTA (S:A4h) – Keyboard Control and Status Register
Reset Value = 0000 0000b
Number
Number
KINL3
KPDE
7 - 4
3 - 0
6 - 4
3 - 0
Bit
Bit
7
7
7
Mnemonic Description
Mnemonic Description
KINM3:0
KINL3:0
KINF3:0
KINL2
KPDE
Bit
Bit
6
6
-
-
Keyboard Input Level Bit
Set to enable a high level detection on the respective KIN3:0 input.
Clear to enable a low level detection on the respective KIN3:0 input.
Keyboard Input Mask Bit
Set to prevent the respective KINF3:0 flag from generating a keyboard interrupt.
Clear to allow the respective KINF3:0 flag to generate a keyboard interrupt.
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.
Reserved
The value read from these bits is always 0. Do not set these bits.
Keyboard Input Interrupt Flag
Set by hardware when the respective KIN3:0 input detects a programmed level.
Cleared when reading KBSTA.
KINL1
5
5
-
KINL0
4
4
-
KINM3
KINF3
3
3
KINM2
KINF2
2
2
KINM1
KINF1
1
1
4109E–8051–06/03
KINM0
KINF0
0
0