Samsung S3C6400X User Manual page 1147

S3C6400X RISC MICROPROCESSOR
KEYPAD INTERRUPT STATUS AND CLEAR REGISTER
Register address
KEYIFSTSCLR 0x7E00A004
KEYIFSTS
P_INT
R_INT
[31:16] -
Reserved
KEYPAD INTERFACE COLUMN DATA OUTPUT REGISTER
Register Address
KEYIFCOL 0x7E00A008
KEYIFCOL
KEYIFCOL
KEYIFCOLEN
[31:16] -
Reserved
R/W
R/W KEYPAD interface status and clear register
Bit
KEYPAD input "press" interrupts (falling edge) status(read) and clear(write)
[7:0]
Read : '1'=Pressed interrupt occurred,
'0'=Does not occur
Write : Pressed interrupt is cleared when write data is '1'
The P_INT[7:0] indicate that each key pressed from 0 to 7 has a dedicated
interrupt to it from P_INT[0] to P_INT[7]
KEYPAD input "release" interrupts (rising edge) status(read) and clear(write)
[15:8]
Read : '1'=Released interrupt occurred, '0'=Does not occur
Write : Released interrupt is cleared when write data is '1'
The R_INT[7:0] indicate that each key released from 0 to 7 has a dedicated
interrupt to it from R_INT[0] to R_INT[7]
R/W
R/W KEYPAD interface column data output register
Bit
KEYPAD interface column data output register
[7:0]
KEYPAD interface column data output tri-state enable register
[15:8]
Each bit is for each KEYIFCOL bit.
'0'= Output pad tri-state buffer enable(Normal output),
'1'= Output pad Tri-state buffer disable(High-Z output) (@ reset)
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Description
Description
Description
Description
KEYPAD INTERFACE
Reset Value
0x0
Reset Value
0x0000FF00
40-9