22 EPSON S1C88650 TECHNICAL MANUAL
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Table 5.1.1(e) I/O Memory map (00FF23H–00FF28H)
Address Bit Name SR R/WFunction Comment10
D7
D6
D5
D4
D3
D2
D1
D0
00FF23 –
–
–
–
–
ESERR
ESREC
ESTRA
–
–
–
–
–
Serial I/F (error) interrupt enable register
Serial I/F (receiving) interrupt enable register
Serial I/F (transmitting) interrupt enable register
–
–
–
–
–
0
–
–
–
–
–
Interrupt
enable
–
–
–
–
–
Interrupt
disable
Constantly "0" when
being read
R/W
00FF25 D7
D6
D5
D4
D3
D2
D1
D0
ETC3
ETU3
ETC2
ETU2
ETC1
ETU1
ETC0
ETU0
PTM3 compare match interrupt enable
PTM3 underflow interrupt enable
PTM2 compare match interrupt enable
PTM2 underflow interrupt enable
PTM1 compare match interrupt enable
PTM1 underflow interrupt enable
PTM0 compare match interrupt enable
PTM0 underflow interrupt enable
0 R/W
Interrupt
enable
Interrupt
disable
00FF26 D7
D6
D5
D4
D3
D2
D1
D0
–
–
–
–
FTM32
FTM8
FTM2
FTM1
–
–
–
–
Clock timer 32 Hz interrupt factor flag
Clock timer 8 Hz interrupt factor flag
Clock timer 2 Hz interrupt factor flag
Clock timer 1 Hz interrupt factor flag
Constantly "0" when
being read
00FF27 D7
D6
D5
D4
D3
D2
D1
D0
–
–
–
–
–
FSERR
FSREC
FSTRA
–
–
–
–
–
Serial I/F (error) interrupt factor flag
Serial I/F (receiving) interrupt factor flag
Serial I/F (transmitting) interrupt factor flag
–
–
–
–
–
0 R/W
–
–
–
–
–
(R)
Generated
(W)
Reset
–
–
–
–
–
(R)
Not generated
(W)
No operation
Constantly "0" when
being read
D7
D6
D5
D4
D3
D2
D1
D0
00FF24 EK07
EK06
EK05
EK04
EK03
EK02
EK01
EK00
K07 interrupt enable
K06 interrupt enable
K05 interrupt enable
K04 interrupt enable
K03 interrupt enable
K02 interrupt enable
K01 interrupt enable
K00 interrupt enable
0
Interrupt
enable
Interrupt
disable
R/W
D7
D6
D5
D4
D3
D2
D1
D0
00FF28 FK07
FK06
FK05
FK04
FK03
FK02
FK01
FK00
K07 interrupt factor flag
K06 interrupt factor flag
K05 interrupt factor flag
K04 interrupt factor flag
K03 interrupt factor flag
K02 interrupt factor flag
K01 interrupt factor flag
K00 interrupt factor flag
0
(R)
Interrupt
factor is
generated
(W)
Reset
(R)
No interrupt
factor is
generated
(W)
No operation
R/W
–
–
–
–
0 R/W
–
–
–
–
(R)
Generated
(W)
Reset
–
–
–
–
(R)
Not generated
(W)
No operation