STG3005A2STR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STG3005A2STR

128-BIT 3D MULTIMEDIA ACCELERATOR

STMicroelectronics 

128-BIT 3D MULTIMEDIA ACCELERATOR

Figure 30. 4 MByte SGRAM configurations using 16Mbit devices

a. RIVA 128 layout compatible

RIVA128ZX

FBDQM[0]#

FBDQM[1]#

FBDQM[2]#

FBDQM[3]#

FBCS[0]#

FBCLK0

FBD[127:0]

Bank 0

512K×32

SGRAM

FBD[31:0]

FBDQM[4]#

FBDQM[5]#

FBDQM[6]#

FBDQM[7]#

FBCS[0]#

FBCLK1

Bank 1

512K×32

SGRAM

FBD[63:32]

b. Compatible with RIVA128ZX layout

implementing SO-DIMM upgrade to 8Mbytes

FBDQM[0]#

FBDQM[1]#

FBDQM[2]#

FBDQM[3]#

FBCS[0]#

FBCLK0

FBD[127:0]

Bank 0

512K×32

SGRAM

FBD[31:0]

FBDQM[8]#

FBDQM[9]#

FBDQM[10]#

FBDQM[11]#

FBCS[1]#

FBCLK0

Bank 2

512K×32

SGRAM

FBD[95:64]

NOTE

1 The 64-bit bus data paths populated by RIVA128ZX are determined by the BIOS during its boot memory detection se-

quence.

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