AX99100QF datasheet(41/70 Pages) ASIX

41 / 70 page

AX99100

PCIe to Multi I/O Controller

Local address Space 1 Enable

1: Enable the address mapping from PCIe BAR1 access to Local Address Space 1.

0: Disable the address mapping.

Hardware Default Value: 0x1

11:10

Reserved

Hardware Default Value: 0x3

Burst Read Enable for Local Address Space 1

1: Enable burst read access

0: Disable burst read access

Hardware Default Value: 0x1

14:13

Reserved

Hardware Default Value: 0x0

BAR1 Enable

1: Enable BAR1 access

0: Disable BAR1 access even offset 0x1D~0x1C, Local Bus PCIe BAR1 Range, are valid.

Hardware Default Value: 0x1

Local Address Space 1 Timing Setting (0x2F~0x2C)

Bit

Description

3:0

ALE Pulse Width (ALE_PW)

ALE pulse width cycle = (ALE_PW +1) * clock period

Hardware Default Value: 0x0

5:4

Data and Address Setup Time (DA_SET)

Address stable or ALE de-assert before RD_N or WR_N assert

Address setup time = DA_SET * clock period

Hardware Default Value: 0x0

7:6

Data and Address Hold Time (DA_HD)

Address and data de-assert after RD_N or WR_N de-assert

Address hold time = DA_HD * clock period

Hardware Default Value: 0x0

11:8

Read Access Time (RD_ACC)

For single access or burst read first cycle

Read access time = (RD_ACC + 1) * clock period

Hardware Default Value: 0x1

15:12

Burst Read Access Time (BRD_ACC)

For burst read second and late cycle

Burst read access time = (BRD_ACC + 1) * clock period

Note: BRD_ACC should large than 0x0.

Hardware Default Value: 0x1

19:16

Write Access Time (WR_ACC)

Write access time = (WR_ACC + 1) * clock period

Hardware Default Value: 0x0

23:20

Access GAP Time (AGAP)

Access back to back time = (AGAP + 1) * clock period

Hardware Default Value: 0x0

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