151
Table 6.8
Interrupt Response Time (cont)
Number of States
Item
NMI
IRQ
PINT
Peripheral
Modules
Notes
Response
time
Total
(5.5 + X)
×
Icyc
+ 0.5
×
Bcyc
(5.5 + X)
×
Icyc
+ 1
×
Bcyc
(5.5 + X)
×
Icyc
(5.5 + X)
×
Icyc
+ 1.5
×
Pcyc
*
6
+ 0.5
×
Pcyc + 4.5
×
Pcyc
*
4
+ 3.5
×
Pcyc
*
6
(5.5 + X)
×
Icyc
+ 3
×
Pcyc
*
7
Minimum
case
*
2
7.5
16.5
12.5
8.5
*
6
/11.5
*
7
At 60-MHz (CKIO
= 30) operation:
0.13–0.28
µ
s
Maximum
case
*
3
8.5 + S
26.5 + S
18.5 + S
10.5 + S
*
6
16.5 + S
*
7
At 60-MHz (CKIO
= 15) operation:
0.26–0.56
µ
s (in
case of operand
cache-hit)
At 60-MHz (CKIO
= 15) operation:
0.29–0.59
µ
s
(when external
memory access is
performed with
wait = 0)
Icyc:
Duration of one cycle of internal clock supplied to CPU.
Bcyc: Duration of one CKIO cycle.
Pcyc: Duration of one cycle of peripheral clock supplied to peripheral modules.
Notes:
*
1 S also includes the memory access wait time.
The processing requiring the maximum execution time is LDC.L @Rm+, SR. When the
memory access is a cache-hit, this requires seven instruction execution cycles. When
the external access is performed, the corresponding number of cycles must be added.
There are also instructions that perform two external memory accesses; if the external
memory access is slow, the number of instruction execution cycles will increase
accordingly.
*
2 The internal clock:CKIO:peripheral clock ratio is 2:1:1.
*
3 The internal clock:CKIO:peripheral clock ratio is 4:1:1.
*
4 IRQ mode
*
5 IRL mode
*
6 Modules: TMU, RTC, SCI, WDT, REFC
*
7 Modules: DMAC, ADC, IrDA, SCIF
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
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