參數(shù)資料
型號: SYM53C141
廠商: LSI CORP
元件分類: 微控制器/微處理器
英文描述: SCSI Bus Expander(SCSI總線擴(kuò)展器)
中文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PQFP128
封裝: PLASTIC, QFP-128
文件頁數(shù): 37/68頁
文件大小: 630K
代理商: SYM53C141
Power and Ground Pins
3-7
3.7 Power and Ground Pins
Note: All V
DD
pins must be supplied 3.3 volts. The SYM53C141 output signals
drive 3.3 volts.
Note: If you separate the power supplies to V
DD
_IO and V
DD
_CORE pins in a
chip testing environment, either power up the pins simultaneously or power
up V
DD
_CORE before V
DD
_IO. The V
DD
_IO pin must always power down
before the V
DD
_CORE pin.
Table 3.5
Power and Ground Signal Description
Power and Ground
Pin
Type
Description
V
DD
_SCSI
3, 37, 47,
57, 67, 77,
91, 101,
111
I
Power supplies to the SCSI bus I/O pins
V
SS
_SCSI
7, 12, 17,
22, 28,
33,52, 62,
68, 80, 83,
100, 106,
116, 127
I
Ground for the SCSI bus I/O pins
V
DD
_CORE
41, 124
I
Power supplies to the CORE logic
V
SS
_CORE
44, 119
I
Ground for the CORE logic
5VBIAS
39
I
5 V biasing pin. This pin must be supplied with 5 V in
a 5 V environment.
Connecting 5VBIAS pin to 5 V allows for 5 V inputs on
the CLK, WS_ENABLE, and RESET/.
Connecting 5VBIAS pin to 3.3 V allows for 3.3 V
inputs on the CLK, WS_ENABLE, and RESET/ pins.
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