Interrupt And Standby Status - Epson 0C88832 Technical Manual

5.14 Interrupt and Standby Status

Types of interrupts
Six systems and 15 types of interrupts have been
provided for the E0C88832/88862.
External interrupt
•K00–K07 input interrupt (2 types)
•K10 input interrupt (1 type)
Internal interrupt
•Clock timer interrupt (4 types)
•Stopwatch interrupt (3 types)
•Programmable timer interrupt (2 types)
•Serial interface interrupt (3 types)
Interrupt factor flag
Interrupt enable register
Interrupt priority register
FPT1
Timer 1
Program-
EPT1
mable
FPT0
timer
Timer 0
EPT0
FK1
K10
EK1
FK0H
Input port K04–K07
EK0H
FK0L
K00–K03
EK0L
FSERR
Error
ESERR
FSREC
Serial
Receive
interface ESREC
FSTRA
Transmit
ESTRA
FSW100
100 Hz
ESW100
FSW10
Stopwatch
10 Hz
timer ESW10
FSW1
1 Hz
ESW1
FTM32
32 Hz
ETM32
FTM8
8 Hz
ETM8
Clock timer
FTM2
2 Hz
ETM2
FTM1
1 Hz
ETM1
E0C88832/88862 TECHNICAL MANUAL
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (Interrupt and Standby Status)
Fig. 5.14.1 Configuration of interrupt circuit
EPSON
An interrupt factor flag that indicates the genera-
tion of an interrupt factor and an interrupt enable
register that sets enable/disable for interrupt
requests have been provided for each interrupt
and interrupt generation can be optionally set for
each factor.
In addition, an interrupt priority register has been
provided for each system of interrupts and the
priority of interrupt processing can be set to 3
levels in each system.
Figure 5.14.1 shows the configuration of the
interrupt circuit.
Refer to the explanations of the respective periph-
eral circuits for details on each interrupt.
address generation
PPT0
PPT1
PK00
PK01
PK10
PK11
PSIF0
PSIF1
PSW0
PSW1
PTM0
PTM1
Vector
address
Interrupt vector
circuit
NMI
Interrupt priority
IRQ3
level judgement
IRQ2
circuit
IRQ1
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