Samsung S3C6400X User Manual page 1146

KEYPAD INTERFACE
KEYPAD INTERFACE REGISTER
Memory Map
Register
KEYIFCON
KEYIFSTSCLR
KEYIFCOL
KEYIFROW 0x7E00A00C
KEYIFFC
Register Description
KEYPAD INTERFACE CONTROL REGISTERS (KEYIFCON)
Register address
KEYIFCON 0x7E00A000
KEYIFCON
INT_F_EN
INT_R_EN
DF_EN
FC_EN
Reserved
Reserved
Note: Both edge interrupt is selected when both INT_F_EN and INT_R_EN are set.
Preliminary product information describe products that are in development,
40-8
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Address R/W
0x7E00A000 R/W KEYPAD interface control register
0x7E00A004 R/W KEYPAD interface status and clear register
0x7E00A008 R/W KEYPAD interface column data output register
R KEYPAD interface row data input register
0x7E00A010 R/W KEYPAD interface debouncing filter clock division
register
R/W
R/W KEYPAD interface control register
Bit
KEYPAD input port falling edge (key-pressed) interrupt
[0]
'0'=Disable, '1'=Enable
KEYPAD input port rising edge (key-released) interrupt
[1]
'0'=Disable, '1'=Enable
KEYPAD input port debouncing filter enable
[2]
'0'=Disable, '1'=Enable
10-bit counter (for Debouncing digital filter clock) enable
[3]
'0'=Disable : Disable use division counter (when RTCCLK is alive clock)
'1'=Enable : use division counter (when OSCIN is alive clock)
-
[5:4]
-
[31:6]
S3C6400X III RISC MICROPROCESSOR
Description
Description
Description
Reset Value
0x00000000
0x00000000
0x0000FF00
Reflects input
ports
0x00000000
Reset Value
0x00