
S1C62920 TECHNICAL MANUAL
EPSON
57
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Interrupt and HALT)
4.12.4 Control of interrupt
Table 4.12.4.1 shows the interrupt control bits and their addresses.
Table 4.12.4.1 Control bits of interrupt
Address
Comment
Register
D3
D2
D1
D0
Name
Init
1
0
*1
EISIF
R/W
EIRF
R/W
EIK0
R/W
EIT0
ISIF
IRF
IK0
IT0
0
EISIF
0
EIRF
0
EIK0
0
EIT2
EIT1
EIT0
0
ISIF
0
IRF
0
IK0
0
IT2
IT1
IT0
–
0
–
0
–
0
–
0
–
0
–
0
–
0
–
0
Enable
Yes
Mask
No
0
EIT1
R/W
0
IT1
0
R
0
R
0
R
EIT2
0
IT2
0
R
0
F0H
F1H
F3H
F4H
F8H
F9H
FBH
FCH
*2
*5
*4
*5
*4
*5
*4
*5
*4
*7
Unused
Interrupt mask register (Serial I/F)
Unused
Interrupt mask register (R/F converter)
Unused
Interrupt mask register (K00–K03)
Unused
Interrupt mask register (Clock timer 2 Hz)
Interrupt mask register (Clock timer 8 Hz)
Interrupt mask register (Clock timer 32 Hz)
Unused
Interrupt factor flag (Serial I/F)
Unused
Interrupt factor flag (R/F converter)
Unused
Interrupt factor flag (K00–K03)
Unused
Interrupt factor flag (Clock timer 2 Hz)
Interrupt factor flag (Clock timer 8 Hz)
Interrupt factor flag (Clock timer 32 Hz)
R
92H
KCP00
R/W
KCP03
KCP02
KCP01
KCP00
KCP01
KCP02
KCP03
1
Input comparison register (K00–K03)
*1 Initial value at the time of initial reset
*5 Constantly "0" when being read
*2 Not set in the circuit
*6 Refer to main manual
*3 Undefined
*7 Page switching in I/O memory is not necessary
*4 Reset (0) immediately after being read
EISIF: Interrupt mask register (F0HD0)
ISIF: Interrupt factor flag (F8HD0)
....................... See Section 4.9, "Serial Interface".
EIRF: Interrupt mask register (F1HD0)
IRF: Interrupt factor flag (F9HD0)
....................... See Section 4.10, "R/F Converter".
KCP03–KCP00: Input comparison registers (92H)
EIK0: Interrupt mask register (F3HD0)
IK0: Interrupt factor flag (FBHD0)
....................... See Section 4.4, "Input Ports".
EIT2, EIT1, EIT0: Interrupt mask registers (F4HD2–D0)
IT2, IT1, IT0: Interrupt factor flags (FCHD2–D0)
....................... See Section 4.8, "Clock Timer".