TMPR4956C datasheet(200/286 Pages) TOSHIBA

200 / 286 page

Chapter 11 TX4956 System Interface

11-32

11.2.12 System Interface Addresses

11.2.12.1 Addressing rules

Addresses that are to be used in word or partial word transactions are arranged to match the size

of the data element. The following rules are used by this system.

•

Target addresses of the block request are aligned to the word boundaries. In other words,

the lower 2 bits of the address become 0.

•

Word requests set the lower 2 bits of the address to 0.

•

Half-word requests set the least significant bit of the address to 0.

•

Byte requests and 3-byte requests use the byte address.

11.2.13 Mode Register of System Interface (G2SConfig)

The Mode Register of System Interface (G2SConfig) is a read/write register. This register is used to

specify a protocol type of a processor write request etc. This register is only Word-Access.

Table 11.2.17 G2SConfig

Address

Field Name

Description

0xF_FF10_0000

G2SConfig

Mode Register of System Interface

Bit

Reserved

Write mode

Data rate

Bit(s)

Field Name

Description

Cold Reset

Read/Write

31:20

Reserved

Read as undefined. Must be written as 0xfff.

Undefined

Read

19:4

Reserved

Read as undefined. Must be written as 0xffff.

0xffff

Read/Write

Reserved

Read as undefined. Must be written as 0.

Read/Write

2:1

Write mode

Processor single write protocols set

00: R4000 compatible write

01: Reserved

10: Pipeline write

11: Reissue write

Read/Write

Data rate

Data transfer rate set for the block write

when 64-bit bus width

0: DDDD

1: DxxDxxDxxDxx

when 32-bit bus width

0 : WWWWWWWW

1: WxxWxxWxxWxxWxxWxxWxxWxx

Read/Write

Note:

When initialized Single write: when 64-bit bus width

ADxx,

when 32-bit bus width

AWxx (R4000 compatible)

Block write: when 64-bit bus width

ADDDD,

when 32-bit bus width

AWWWWWWWW

Figure 11.2.29 G2SConfig Register Formats(When R5000 protocol (MODE*=1))

TMPR4956C Datasheet(PDF) 200 Page - Toshiba Semiconductor

TMPR4956C Datasheet(HTML) 200 Page - Toshiba Semiconductor

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