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4 operation, 1 supported pci commands – Renesas SH7781 User Manual

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13. PCI Controller (PCIC)

Rev.1.00 Jan. 10, 2008 Page 630 of 1658
REJ09B0261-0100

13.4

Operation

13.4.1

Supported PCI Commands

Table 13.4 Supported PCI Commands

C/

BE[3:0]

Commands

PCI Master

PCI Target

0000 Interrupt

acknowledge cycle

No

0001 Special

cycle

Yes*

1

0010 I/O

read

Yes

Yes*

2

0011 I/O

write

Yes

Yes*

2

0100 Reserved

0101 Reserved

0110 Memory

read

Yes

Yes

0111 Memory

write

Yes

Yes

1000 Reserved

1001 Reserved

1010 Configuration

read

Yes*

1

Yes

1011 Configuration

write

Yes*

1

Yes

1100

Memory read multiple

No

Partially yes*

3

1101

Dual address cycle

No

No

1110

Memory read line

No

Partially yes*

3

1111

Memory write and invalidate

No

Partially yes*

4

Legend:

Yes: Supported

Partially yes: Supported with conditions

No: Not

supported

⎯: Not

respond

Notes: 1. Only host mode supported

2. Only single transfer

3. Operate as the memory read command

4. Operate as the memory write command