R8CSLASH2G datasheet(137/344 Pages) RENESAS

137 / 344 page

R8C/2G Group

13. Interrupts

Rev.1.00

Apr 04, 2008

Page 117 of 318

REJ09B0387-0100

13.1.6.5

Interrupt Response Time

Figure 13.6 shows the Interrupt Response Time. The interrupt response time is the period between an interrupt

request generation and the execution of the first instruction in the interrupt routine. The interrupt response time

includes the period between interrupt request generation and the completion of execution of the instruction

(refer to (a) in Figure 13.6) and the period required to perform the interrupt sequence (20 cycles, refer to (b) in

Figure 13.6).

Figure 13.6

Interrupt Response Time

13.1.6.6

IPL Change when Interrupt Request is Acknowledged

When an interrupt request of a maskable interrupt is acknowledged, the interrupt priority level of the

acknowledged interrupt is set in the IPL.

When a software interrupt or special interrupt request is acknowledged, the level listed in Table 13.5 is set in the

IPL.

Table 13.5 lists the IPL Value When Software or Special Interrupt Is Acknowledged.

NOTE:

1. When non-maskable interrupts is selected.

Table 13.5

IPL Value When Software or Special Interrupt Is Acknowledged

Interrupt Source

Value Set in IPL

Watchdog timer, voltage monitor 1, voltage monitor 2,

comparator 1(1), comparator 2(1), address break

Software, address match, single-step

Not changed

Interrupt request is generated. Interrupt request is acknowledged.

Instruction

Interrupt sequence

Instruction in

interrupt routine

Time

(a)

20 cycles (b)

Interrupt response time

(a) Period between interrupt request generation and the completion of execution of an

instruction. The length of time varies depending on the instruction being executed. The

DIVX instruction requires the longest time, 30 cycles (no wait and when the register is set

as the divisor)

(b) 21 cycles for address match and single-step interrupts.

R8C/2G 数据表(PDF) 137 Page - Renesas Technology Corp

R8C/2G 数据表(HTML) 137 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载