參數(shù)資料
型號(hào): 82803AAMRH-R
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù): 35/52頁
文件大?。?/td> 322K
代理商: 82803AAMRH-R
82803AA MRH-R
R
Datasheet
35
4.1.3.7.
RDRAM Register Operations
This section describes the serial read and write operations for control registers in RDRAM devices.
Figure 11 shows the RDRAM register read sequence and Figure 12 shows the RDRAM register write
sequence.
Figure 11. RDRAM Register Read from the Expansion Serial Bus
rdram_reg_rd_expbus
ExSCK
ExCmd
0
3
2
1
ExSIO
4
19
RNC
0
3
2
1
4
20
SRD
0
3
2
1
4
19
SRD
SRA
SINT
SD
36
52
68
SRA
SINT
SD
36
52
68
SCK(i)
Cmd(i)
SIO(i)
Figure 12. RDRAM Register Write from the Expansion Serial Bus
rdram_reg_wr_expbus
ExSCK
ExCmd
0
3
2
1
ExSIO
4
19
RNC
0
3
2
1
4
20
SWR
0
3
2
1
4
19
SWR
SRA
SD
SINT
36
52
68
SRA
SD
SINT
36
52
68
SCK(i)
Cmd(i)
SIO(i)
4.1.4.
SMBUS Operation
The MRH-R integrates an SMBUS controller to access data to and from the SPD EEPROMs on the
RIMMs residing on its channels. There can be a maximum of 8 SPD EPROM associated with two
channels. The BIOS accesses the SPD EPROM by issuing a command to the MCH. The MCH in turn
sends this command to the appropriate MRH-R through an SIO request packet using the SCK/CMD/SIO
interface signals. Once the MRH-R receives this command, it generates the appropriate SMBUS
commands to the SPD EEPROMs.
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