M3885 datasheet(60/103 Pages) RENESAS

60 / 103 page

3885 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Fig. 53 Structure of serialized IRQ request register

[Serialized IRQ request register (SERIRQ)] 001F16

The interrupt source is definable by this register.

Bit 0 : Software IRQ1 request bit (IR1)

SERIRQ line shows IR1 value at the sample phase of IRQ1 frame,

when the SCH0EN is “1”.

Bit 1 : Software IRQ12 request bit (IR12)

SERIRQ line shows IR12 value at the sample phase of IRQ12

frame, when the SCH0EN is “1”.

Bits 2-6 : IRQx frame select bits (ISi, i = 0–4)

These bits select the active IRQ frame of serial IRQ channel 1.

When these bit are “000002”, the serial IRQ channel 1 is disabled.

Bit 7 : Software IRQx request bit (IRx)

SERIRQ line shows IRx value at the sample phase of IRQx frame

which is selected by bits 2 to 6 of SERIRQ. Output level is select-

able by the IRQx output polarity bit (SCH1POL).

Serialized IRQ request register

When reset

000000002

Bit nameFunction

Bit symbol

IRQx frame select bit

Software IRQx

request bit

0: No IRQx request

1: IRQx request

b6b5b4b3b2

0 0 0 0 0 : Disable serial IRQ channel 1

0 0 0 0 1 : IRQ1 Frame

0 0 0 1 0 : IRQ2 Frame

0 0 0 1 1 : IRQ3 Frame

0 0 1 0 0 : IRQ4 Frame

0 0 1 0 1 : IRQ5 Frame

0 0 1 1 0 : IRQ6 Frame

0 0 1 1 1 : IRQ7 Frame

0 1 0 0 0 : IRQ8 Frame

0 1 0 0 1 : IRQ9 Frame

0 1 0 1 0 : IRQ10 Frame

0 1 0 1 1 : IRQ11 Frame

0 1 1 0 0 : IRQ12 Frame

0 1 1 0 1 : IRQ13 Frame

0 1 1 1 0 : IRQ14 Frame

0 1 1 1 1 : IRQ15 Frame

1 0 0 0 0 : Do not select

1 0 0 0 1 : Do not select

1 0 0 1 0 : Do not select

1 0 0 1 1 : Do not select

1 0 1 0 0 : Do not select

1 0 1 0 1 : Extend Frame 0

1 0 1 1 0 : Extend Frame 1

1 0 1 1 1 : Extend Frame 2

1 1 0 0 0 : Extend Frame 3

1 1 0 0 1 : Extend Frame 4

1 1 0 1 0 : Extend Frame 5

1 1 0 1 1 : Extend Frame 6

1 1 1 0 0 : Extend Frame 7

1 1 1 0 1 : Extend Frame 8

1 1 1 1 0 : Extend Frame 9

1 1 1 1 1 : Extend Frame 10

0: No IRQ1 request

1: IRQ1 request

0: No IRQ12 request

1: IRQ12 request

Software IRQ1

request bit

Software IRQ12

request bit

IR1

IR12

IS0

IS1

IS2

IS3

IS4

IRx

Symbol

SERIRQ

Address

001F16

M3885 Datasheet(PDF) 60 Page - Renesas Technology Corp

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