参数资料
型号: SYM53C180I2
厂商: LSI CORP
元件分类: 总线控制器
英文描述: SCSI BUS CONTROLLER, PBGA192
封装: 23 X 23 MM, 1.27 MM PITCH, PLASTIC, BGA-192
文件页数: 13/78页
文件大小: 1073K
代理商: SYM53C180I2
2-2
Functional Descriptions
Figure 2.1
SYM53C180 Block Diagram
In its simplest form, the SYM53C180 passes data and parity from a
source bus to a load bus. The side asserting, deasserting or releasing
the SCSI signals is the source side. The model of the SYM53C180
represents pieces of wire that allow corresponding SCSI signals to ow
from one side to the other side. The SYM53C180 monitors arbitration
and selection by devices on the bus so it can enable the proper drivers
to pass the signals along. In addition, the SYM53C180 does signal
retiming to maintain the signal skew budget from the source bus to the
load bus.
2.1.1 SCSI A Side and B Side Control Blocks
The SCSI A Side pins are connected internally to the corresponding
SCSI B Side pins, forming bidirectional connections to the SCSI bus.
In the LVD/LVD mode, the SCSI A Side and B Side control blocks
connect to both targets and initiators and accept any asynchronous or
synchronous data transfer rates up to the 160 Mbytes/s rate of Wide
Ultra3 SCSI. TolerANT and LVD Link technologies are part of both the
A Side and B Side control blocks.
Retiming
Logic
Precision
Delay
Control
State
Machine
Control
LV
D
DIFFSENS
Receiv
er
LV
D
DIFFSENS
Receiv
er
SCSI
Contr
ol
Bloc
k
SCSI
Contr
ol
Bloc
k
LVD
Link
T
ransceiv
ers
LVD
Link
T
ransceiv
ers
Control
Signals
LVD, Single-ended,
Wide Ultra SCSI Bus
(A Side)
LVD, Single-ended
Wide Ultra SCSI Bus
(B Side)
A_DIFFSENS
B_DIFFSENS
40 MHz Clock Input
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