參數(shù)資料
型號(hào): DS31256+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 59/183頁(yè)
文件大?。?/td> 0K
描述: IC CTRLR HDLC 256-CHANNEL 256BGA
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 40
控制器類型: HDLC 控制器
接口: 串行
電源電壓: 3 V ~ 3.6 V
電流 - 電源: 500mA
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 256-BBGA
供應(yīng)商設(shè)備封裝: 256-BGA(27x27)
包裝: 管件
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DS31256 256-Channel, High-Throughput HDLC Controller
151 of 183
Bridge Mode Bus Transaction Timing
When the local bus is operated in PCI bridge mode, the bus transaction time can be determined either
from an external ready signal (
LRDY) or from the PCI bridge mode control register (LBBMC), which
allows a bus transaction time of 1 to 11 LCLK cycles. If the total access time to the local bus exceeds 16
PCLK cycles, the PCI access times out and a PCI target retry is sent to the host. This only occurs when
LRDY has not been detected within 9 clocks. If this happens, the local bus error (LBE) status bit in the
status master (SM) register is set. Additional details about the LBE status bit can be found in Section 5.
More details about transaction timing can be found in Figure 10-4 and the timing examples in
Section 11.3.
Bridge Mode Interrupt
In the PCI bridge mode, the local bus can detect an external interrupt through the
LINT signal. If the
local bus detects that the
LINTA signal has been asserted, it then sets the LBINT status bit in the status
master (SM) register. Setting this status bit can cause a hardware interrupt to occur at the PCI bus
through the
PINTA signal. This interrupt can be masked through the ISM register. See Section 5 for
more details.
11.1.2 Configuration Mode
In configuration mode, the local bus is used only to configure the device and obtain status information
from the device. It is also used to configure the PCI configuration registers and therefore the PCI bus
signal PIDSEL is disabled when the local bus is in the configuration mode. The DS31256 PCI
configuration registers can't be accessed via the PCI bus when the DS31256 is in Configuration mode
(LMS=1). In this mode no device registers are accessible via the PCI bus.
Data cannot be passed from the local bus to the PCI bus in this mode. The PCI bus is only used as a
high-speed I/O bus for the HDLC packet data. In this mode, bus arbitration, bus format, and the user-
settable bus transaction time features are disabled. All bus accesses are based on 16-bit addresses and 16-
bit data in this mode. The upper four addresses (LA[19:16]) are ignored and 8-bit data accesses are not
allowed. See Section 13 for the AC timing requirements.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS31256+ 功能描述:輸入/輸出控制器接口集成電路 256Ch High Thruput HDLC Cntlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
DS31256B 功能描述:輸入/輸出控制器接口集成電路 256Ch High Thruput HDLC Cntlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
DS31256DK 功能描述:網(wǎng)絡(luò)開(kāi)發(fā)工具 RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V
DS31256-W+ 制造商:Maxim Integrated Products 功能描述:ENVOY 256 CHANNEL HDLC - WAIVER - Rail/Tube
DS312BNC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC