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| 型號(hào)： | DS3134 |
| 廠(chǎng)商： | DALLAS SEMICONDUCTOR |
| 元件分類(lèi)： | 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)： | 48/203頁(yè) |
| 文件大小： | 777K |
| 代理商： | DS3134 |
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DS3134
141 of 203
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 0; Bits 0 to 31 / Current Data Buffer Address. The current 32-bit address of the data buffer that
is being used. This address is used by the DMA to keep track of where data should be read from as it is
passed to the transmit FIFO.
- HOST MUST CONFIGURE -
dword 1; Bit 0 / Channel Enable (CHEN).
This bit is controlled by both the Host and the transmit
DMA to enable and disable a HDLC channel. The DMA will automatically disable a channel when an
error condition occurs (see Section 8.2.1 for a discussion on error conditions).
The DMA will
automatically enable a channel when it detects that the Channel Reset (CHRST) bit in the Pending Queue
descriptor is set to a one.
0 = HDLC Channel Disabled
1 = HDLC Channel Enabled
- HOST MUST CONFIGURE -
dword 1; Bit 1 / Done Queue Select (DQS). This bit determines whether the transmit DMA will write
to the Done Queue only after a complete HDLC packet (which may be only a single buffer) has been
transmitted (in which case the Descriptor Pointer in the Done Queue will correspond to the first descriptor
of the packet) or whether it should write to the Done Queue after each data buffer has been transmitted (in
which case the Descriptor Pointer in the Done Queue will correspond to a single data buffer). The setting
of this bit also affects the reporting of the Status field in the Transmit Done Queue. When DQS = 0, the
only non-errored status possible is a setting of 000. When DQS = 1, then the non-errored settings of 001,
010, and 011 are possible.
0 = write to the Done Queue only after a complete HDLC packet has been transmitted
1 = write to the Done Queue after each data buffer is transmitted
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bit 2/ Unused. This field is not used by the DMA and could be any value when read.
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bits 3 to 15 / Byte Count. The DMA uses these 13 bits to keep track of the number of bytes
stored in the data buffer. Maximum is 8191 bytes (0000h =0 bytes / 1FFFh = 8191 bytes).
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bit 16 / Chain Valid (CV). This is an internal copy of the CV field that resides in the current
Packet Descriptor that the DMA is operating on. See Section 8.2.2 for more details on the CV bit.
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bit 17 / End Of Frame (EOF). This is an internal copy of the EOF field that resides in the
current Packet Descriptor that the DMA is operating on. See Section 8.2.2 for more details on the EOF
bit.
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(chǎng)家 制造商全稱(chēng):未知廠(chǎng)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(lèi)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(chēng):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(kāi)發(fā)工具 DS31400 Dev Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類(lèi)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(lèi)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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