TUSB7340 datasheet(49/122 Pages) TI2

49 / 122 page

8.1.29 Next Item Pointer Register

The contents of this read-only register indicate the next item in the linked list of capabilities for the TUSB73X0.

This register reads 70h pointing to the PCI Express Capability registers.

PCI register offset: 49h

Default value: 70h

Table 8-38. PCI Register 49h

Bit No.

Reset State

8.1.30 MSI Message Control Register

The register is used to control the sending of MSI messages.

PCI register offset: 4Ah

Default value: 0086h

Table 8-39. PCI Register 4Ah

Bit

No.

Reset

State

Table 8-40. MSI Message Control Register Description

BIT

FIELD NAME

ACCESS

DESCRIPTION

15:8

RSVD

Reserved. Returns zeros when read.

PVM_CAP

Per-vector Masking Capable. This bit is read only 0 indicating that the

TUSB73X0 does not support per-vector masking.

64CAP

64 Bit Message Capability. This bit is read only 1 indicating that the

TUSB73X0 supports 64 bit MSI message addressing.

6:4

MM_EN

Multiple Message Enable. This bit indicates the number of distinct

messages that the TUSB73X0 is allowed to generate.

000 – 1 Message (All interrupters mapped to the same message)

001 – 2 Messages (Interrupters 0, 2, 4, and 6 mapped to message 0 and

Interrupters 1, 3, 5, and 7 mapped to message 1)

010 – 4 Messages (Interrupters 0 and 4 mapped to message 0,

Interrupters 1 and 5 mapped to message 1, Interrupters 2 and 6 mapped

to message 2, Interrupters 3 and 7 mapped to message 3)

011 – 8 Messages (Interrupter # mapped to corresponding message #)

100 – 16 Messages (Interrupter # mapped to corresponding message #)

101 – 32 Messages (Interrupter # mapped to corresponding message #)

110 – Reserved111 – Reserved

3:1

MM_CAP

Multiple Message Capabilities. This field indicates the number of distinct

messages that TUSB73X0 is capable of generating. This field is read

only 011 indicating that the TUSB73X0 can signal 8 distinct messages.

MSI_EN

MSI Enable. This bit is used to enable MSI interrupt signaling. MSI

signaling must be enabled by software for the TUSB73X0 to signal an

MSI

0 – MSI signaling is prohibited

1 – MSI signaling is enabled

www.ti.com

TUSB7320, TUSB7340

SLLSE76Q – MARCH 2011 – REVISED MARCH 2024

Submit Document Feedback

Product Folder Links: TUSB7320 TUSB7340

TUSB7340 数据表(PDF) 49 Page - Texas Instruments

TUSB7340 数据表(HTML) 49 Page - Texas Instruments

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