R8CSLASH20 datasheet(108/501 Pages) RENESAS

108 / 501 page

R8C/20 Group, R8C/21 Group

12. Interrupts

Rev.2.00 Aug 27, 2008

Page 92 of 458

REJ09B0250-0200

12.1.6

Interrupt Control

The following describes enable/disable the maskable interrupts and set the priority order to acknowledge. The

contents explained does not apply to the nonmaskable interrupts.

Use the I flag in the FLG register, IPL and the ILVL2 to ILVL0 bits in each interrupt control register to enable/

disable the maskable interrupts. Whether an interrupt is requested is indicated by the IR bit in each interrupt

control register.

Figure 12.3 shows the Interrupt Control Register, Figure 12.4 shows Registers TRD0IC, TRD1IC, SSUIC, and

IICIC and Figure 12.5 shows the Registers INT0IC to INT3IC.

Figure 12.3

Interrupt Control Register

(2)

Symbol

Address

After Reset

TREIC

004Ah

XXXXX000b

KUPIC

004Dh

XXXXX000b

ADIC

004Eh

XXXXX000b

S0TIC

0051h

XXXXX000b

S0RIC

0052h

XXXXX000b

S1TIC

0053h

XXXXX000b

S1RIC

0054h

XXXXX000b

TRAIC

0056h

XXXXX000b

TRBIC

0058h

XXXXX000b

Bit Symbol

Bit Name

Function

NOTES:

2. Rew rite the interrupt control register, rew rite it w hen the interrupt request w hich is applicable for its register is not

generated. Refer to 12.6.5 Changing Interrupt Control Register Contents.

b7 b6 b5 b4 b3 b2 b1 b0

ILVL0

Interrupt priority level select bits

b2 b1 b0

0 0 0 : Level 0 (interrupt disable)

0 0 1 : Level 1

0 1 0 : Level 2

0 1 1 : Level 3

1 0 0 : Level 4

1 0 1 : Level 5

1 1 0 : Level 6

1 1 1 : Level 7

ILVL1

ILVL2

Interrupt request bit

0 : Requests no interrupt

1 : Requests interrupt

RW(1)

—

(b7-b4)

—

Nothing is assigned. If necessary, set to 0.

When read, the content is indeterminate.

Only 0 can be w ritten to the IR bit. Do not w rite 1.

R8C/20 Datasheet(PDF) 108 Page - Renesas Technology Corp

R8C/20 Datasheet(HTML) 108 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

Datasheet Download

Link URL