Preliminary
S3C2451X RISC MICROPROCESSOR
I/O PORTS
11-41
EINTFLTn (External Interrupt Filter Register n)
To recognize the level interrupt, the valid logic level on EXTINTn pin must be retained for 40ns at least because of
the noise filter.
Register Address
R/W
Description
Reset
Value
EINTFLT0 0x56000094 R/W
Reserved
0x0
EINTFLT1 0x56000098 R/W
Reserved
0x0
EINTFLT2 0x5600009c
R/W
External
interrupt control register 2
0x0
EINTFLT3 0x4c6000a0
R/W
External
interrupt control register 3
0x0
EINTFLT2 Bit
Description
FLTCLK19 [31]
Filter
clock
of EINT19 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT19
[30:24]
Filtering width of EINT19
FLTCLK18 [23]
Filter
clock
of EINT18 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT18
[22:16]
Filtering width of EINT18
FLTCLK17 [15]
Filter
clock
of EINT17 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT17
[14:8]
Filtering width of EINT17
FLTCLK16
[7]
Filter clock of EINT16 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT16
[6:0]
Filtering width of EINT16
EINTFLT3 Bit
Description
FLTCLK23 [31]
Filter
clock
of EINT23 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT23
[30:24]
Filtering width of EINT23
FLTCLK22 [23]
Filter
clock
of EINT22 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT22
[22:16]
Filtering width of EINT22
FLTCLK21 [15]
Filter
clock
of EINT21(configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT21
[14:8]
Filtering width of EINT21
FLTCLK20
[7]
Filter clock of EINT20 (configured by OM)
0 = PCLK
1= EXTCLK/OSC_CLK
EINTFLT20
[6:0]
Filtering width of EINT20