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參數(shù)資料
| 型號(hào)： | DS3134 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Digital Transmission Controller |
| 英文描述： | DATACOM, FRAMER, PBGA256 |
| 封裝： | 27 X 27 MM, PLASTIC, BGA-256 |
| 文件頁(yè)數(shù)： | 60/203頁(yè) |
| 文件大小： | 777K |
| 代理商： | DS3134 |
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DS3134
152 of 203
Register Name:
PCMD0
Register Description: PCI Command / Status Register 0
Register Address:
0x004
lsb
STEPC
PARC
VGA
MWEN
SCC
MASC
MSC
IOC
Reserved (Read Only / set to all zeros)
FBBEN
PSEC
FBBCT
UDF
66 MHz
Reserved (Read Only / set to all zeros)
msb
PPE
PSE
MABT
TABTM
TABT
DTS1
DTS0
PARR
Note : Read only bits in the PCMD0 register are indicated above by being underlined. All other bits are
read-write.
The lower word (bits 0 to 15) of the PCMD0 register is the Command portion and is used for control of
the PCI bus. When all bits in the lower word are set to zero, then the device is logically disconnected
from the bus for all accesses except for accesses to the configuration registers. The upper word (bits 16 to
31) is the Status portion and it is used for status information. Reads to the Status portion behave normally
but writes are unique in that bits can be reset (i.e. forced to zero) but not set (i.e. forced to one). A bit in
the Status portion will be reset when a one is written to that bit position. Bit positions that have a zero
written to them will not be reset.
COMMAND BITS
Bit 0 / I/O Space Control (IOC). This read only bit is forced to zero by the device to indicate that it
does not respond to I/O Space accesses.
Bit 1 / Memory Space Control (MSC). This read/write bit controls whether or not the device will
respond to accesses by the PCI bus to the memory space (which is the internal device configuration
registers).
When this bit is set to zero, the device will ignore accesses attempted to the internal
configuration registers and when set to one; the device will allow accesses to the internal configuration
registers. This bit should be set to zero when the Local Bus is operated in the Configuration Mode. This
bit is force to zero when a hardware reset is initiated via the PRST* pin.
0 = ignore accesses to the internal device configuration registers
1 = allow accesses to the internal device configuration registers
Bit 2 / Master Control (MASC). This read/write bit controls whether or not the device can act as a
master on the PCI bus. When this bit is set to zero, the device cannot act as a master and when it is set to
one, the device can act as a bus master. This bit is forced to zero when a hardware reset is initiated via
the PRST* pin.
0 = deny the device from operating as a bus master
1 = allow the device to operate as a bus master
Bit 3 / Special Cycle Control (SCC). This read only bit is forced to zero by the device to indicate that it
cannot decode Special Cycle operations.
Bit 4 / Memory Write & Invalidate Command Enable (MWEN). This read only bit is forced to zero
by the device to indicate that it cannot generate the Memory Write and Invalidate command.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS3150QN | DATACOM, PCM TRANSCEIVER, PQCC28 |
| DS3150Q | DATACOM, PCM TRANSCEIVER, PQCC28 |
| DS3150TN | DATACOM, PCM TRANSCEIVER, PDIP48 |
| DS3150T | DATACOM, PCM TRANSCEIVER, PQFP48 |
| DS5000FP-12 | 8-BIT, 12 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS-313PIN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Miscellaneous |
| DS-313-PIN | 功能描述:信號(hào)調(diào)節(jié) RoHS:否 制造商:EPCOS 產(chǎn)品:Duplexers 頻率:782 MHz, 751 MHz 頻率范圍: 電壓額定值: 帶寬: 阻抗:50 Ohms 端接類型:SMD/SMT 封裝 / 箱體:2.5 mm x 2 mm 工作溫度范圍:- 30 C to + 85 C 封裝:Reel |
| DS31400 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:8-Input, 14-Output, Dual DPLL Timing IC with Sub-ps Output Jitter |
| DS31400DK | 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 DS31400 Dev Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| DS31400GN | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Not Available From Mouser RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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