參數(shù)資料
型號(hào)： LSI53C141
英文描述： LSI53C141 SCSI Bus Expander technical manual v2.1 11/00
中文描述： LSI53C141 SCSI總線擴(kuò)展技術(shù)手冊(cè)2.1 11/00
文件頁數(shù)： 76/166頁
文件大?。?/td> 1330K
代理商： LSI53C141
3-28
SAF-TE Source Code
Function
Description
Write LED Bits
Program Tag
OPC_WRITE_LED_BITS
Shift
Any value between 0 and 6 is legal.
Address
Lower 8-bits Only (0-7 valid)
Accumulator
Input
Action
Update the register specified by address. Two
bits (based on the shift specified) are replaced
by the two LSBs in the accumulator. The bits
replaced are in the position specified by: 3 <<
shift. That is, if the shift is 0 bits, 0 and 1 are
replaced; if the shift is 3 bits, 3 and 4 are
replaced.
Note:
The maximum shift value is 6 (replace
bits 6 and 7).
Function
Description
Device to State
Program Tag
OPC_DEVICE_TO_STATE
Shift
Not used.
Address
Lower 8-bits Only (Maximum value is
configuration dependent, but it is always less
than 64)
Accumulator
Output
Action
The accumulator will return the status of the
slot. The command Read Device Slot Status
(0x04) requires a 4 Byte representation of the
slot status. Bytes 0,1 (bits 0 and 1) and 3
(bits 0–2) contain information on the slot status.
Beginning with byte 3, then 0 and finally byte 1,
the individual bits in the data memory for the
specified slot are checked. If a bit is set, then
the accumulator is set according to the
Table 3.5
.
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