24 I/O PORTS (GPIO)
24-20
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
D[3:0]
SFGP[B:8]: FPT[B:8] Interrupt Flag Bits
These are interrupt flags indicating the port input interrupt 2 (FPT8–FPTB) occurrence status. (Default:
undefined)
1 (R):
Interrupt cause occurred
0 (R):
No interrupt cause occurred
1 (W):
Reset flag
0 (W):
Ignored
See the descriptions of SFGP[3:0]/GPIO_FPT03_FLG register.
FPTC–F Interrupt Flag Register (GPIO_FPTCF_FLG)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
FPTC–F
Interrupt Flag
Register
(GPIO_FPTCF_
FLG)
0x300343
(8 bits)
D7–4 –
reserved
–
–
–
0 when being read.
D3
SFGPF
FPTF interrupt flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
X
R/W Reset by writing 1.
D2
SFGPE
FPTE interrupt flag
X
R/W
D1
SFGPD
FPTD interrupt flag
X
R/W
D0
SFGPC
FPTC interrupt flag
X
R/W
D[7:4]
Reserved
D[3:0]
SFGP[F:C]: FPT[F:C] Interrupt Flag Bits
These are interrupt flags indicating the port input interrupt 3 (FPTC–FPTF) occurrence status. (Default:
undefined)
1 (R):
Interrupt cause occurred
0 (R):
No interrupt cause occurred
1 (W):
Reset flag
0 (W):
Ignored
See the descriptions of SFGP[3:0]/GPIO_FPT03_FLG register.
FPT0–1 Interrupt Chattering Filter Control Register (GPIO_FPT01_CHAT)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
FPT0–1
Interrupt
Chattering
Filter Control
Register
(GPIO_FPT01_
CHAT)
0x300344
(8 bits)
D7
–
reserved
–
–
–
0 when being read.
D6–4 SCTP1[2:0] FPT1 chattering filter time select
SCTP1[2:0]
Filter sampling
time
0x0 R/W
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
64/f
PCLK2
32/f
PCLK2
16/f
PCLK2
8/f
PCLK2
4/f
PCLK2
2/f
PCLK2
1/f
PCLK2
None
D3
–
reserved
–
–
–
0 when being read.
D2–0 SCTP0[2:0] FPT0 chattering filter time select
SCTP0[2:0]
Filter sampling
time
0x0 R/W
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
64/f
PCLK2
32/f
PCLK2
16/f
PCLK2
8/f
PCLK2
4/f
PCLK2
2/f
PCLK2
1/f
PCLK2
None
D7
Reserved
D[6:4]
SCTP1[2:0]: FPT1 Chattering Filter Time Select Bits
Configures the chattering filter circuit for the FPT1 port.
D3
Reserved
D[2:0]
SCTP0[2:0]: FPT0 Chattering Filter Time Select Bits
Configures the chattering filter circuit for the FPT0 port.
The FPT interrupt input ports include a chattering filter circuit for key entry that can be disabled or en-
abled with a filter sampling time specified individually for each FPT port using SCTP
n
[2:0].