24 I/O PORTS (GPIO)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
24-19
D[3:0]
SIET[F:C]: FPT[F:C] Interrupt Enable Bits
Enables or disables the ports to generate port interrupt 3 (FPTC–FPTF).
1 (R/W): Interrupt enabled
0 (R/W): Interrupt disabled (default)
FPT0–3 Interrupt Flag Register (GPIO_FPT03_FLG)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
FPT0–3
Interrupt Flag
Register
(GPIO_FPT03_
FLG)
0x300340
(8 bits)
D7–4 –
reserved
–
–
–
0 when being read.
D3
SFGP3
FPT3 interrupt flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
X
R/W Reset by writing 1.
D2
SFGP2
FPT2 interrupt flag
X
R/W
D1
SFGP1
FPT1 interrupt flag
X
R/W
D0
SFGP0
FPT0 interrupt flag
X
R/W
D[7:4]
Reserved
D[3:0]
SFGP[3:0]: FPT[3:0] Interrupt Flag Bits
These are interrupt flags indicating the port input interrupt 0 (FPT0–FPT3) occurrence status. (Default:
undefined)
1 (R):
Interrupt cause occurred
0 (R):
No interrupt cause occurred
1 (W):
Reset flag
0 (W):
Ignored
SFGP
n
is the interrupt flag corresponding to the individual ports for port input interrupts and is set to
1 at the specified edge (rising or falling edge) or level (high or low) of the input signal. When the cor-
responding SIET
n
bit has been set to 1, a port interrupt request signal is also output to the ITC at the
same time. An interrupt is generated if the ITC and C33 PE Core interrupt conditions are satisfied.
SFGP
n
is reset by writing 1.
FPT4–7 Interrupt Flag Register (GPIO_FPT47_FLG)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
FPT4–7
Interrupt Flag
Register
(GPIO_FPT47_
FLG)
0x300341
(8 bits)
D7–4 –
reserved
–
–
–
0 when being read.
D3
SFGP7
FPT7 interrupt flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
X
R/W Reset by writing 1.
D2
SFGP6
FPT6 interrupt flag
X
R/W
D1
SFGP5
FPT5 interrupt flag
X
R/W
D0
SFGP4
FPT4 interrupt flag
X
R/W
D[7:4]
Reserved
D[3:0]
SFGP[7:4]: FPT[7:4] Interrupt Flag Bits
These are interrupt flags indicating the port input interrupt 1 (FPT4–FPT7) 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.
FPT8–B Interrupt Flag Register (GPIO_FPT8B_FLG)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
FPT8–B
Interrupt Flag
Register
(GPIO_FPT8B_
FLG)
0x300342
(8 bits)
D7–4 –
reserved
–
–
–
0 when being read.
D3
SFGPB
FPTB interrupt flag
1 Cause of
interrupt
occurred
0 Cause of
interrupt not
occurred
X
R/W Reset by writing 1.
D2
SFGPA
FPTA interrupt flag
X
R/W
D1
SFGP9
FPT9 interrupt flag
X
R/W
D0
SFGP8
FPT8 interrupt flag
X
R/W
D[7:4]
Reserved