Table of Contents
Advertisement
CHAPTER 7 INTERRUPT
●
When the data counter (DCT) count terminates (final data transfer)
Because the hardware interrupt is activated when data transfer by EI
time is added. The EI
formula:
2
EI
(21 + 6 × Z) Machine cycles
Interrupt handling time
The interrupt handling time is different for each address pointed to by the stack pointer. Table 7.6-4 shows
the interpolation value (Z) for the interrupt handling time.
Table 7.6-4 Interpolation Value (Z) for the Interrupt Handling Time
External 8-bit
External even-numbered address
External odd-numbered address
Internal even-numbered address
Internal odd-numbered address
●
For termination by a termination request from the peripheral function (I/O)
When data transfer by EI
peripheral function (I/O) (ICR: S1, S0 = 11
is activated. The EI
indicates the interpolation value for the interrupt handling time (Table 7.6-4).
2
OS processing time for termination before completion = 36 + 6 × Z Machine cycle
EI
Reference:
One machine cycle corresponds to one clock cycle of the machine clock (φ).
148
2
OS processing time when counting terminates is calculated with the following
OS processing time when counting terminates = EI
Address pointed to by the stack pointer
2
OS is terminated before completion due to a termination request from the
2
OS processing time is calculated with the following formula. Z in the formula
2
OS terminates, the interrupt handling
2
OS processing time when data is transferred +
), the data transfer is not performed and a hardware interrupt
B
Interpolation value (Z)
+4
+1
+4
0
+2
Advertisement
Table of Contents
