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參數(shù)資料
| 型號(hào)： | MSC8256TVT1000B |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 38/70頁(yè) |
| 文件大小： | 0K |
| 描述： | IC DSP 6 CORE 1GHZ 783FCPBGA |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | StarCore |
| 類型： | SC3850 內(nèi)核 |
| 接口： | 以太網(wǎng)，I²C，PCI，RGMII，串行 RapidIO，SGMII，SPI，UART/USART |
| 時(shí)鐘速率： | 1.0GHz |
| 非易失內(nèi)存： | ROM（96 kB） |
| 芯片上RAM： | 576kB |
| 電壓 - 輸入/輸出： | 2.50V |
| 電壓 - 核心： | 1.00V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 783-BBGA，F(xiàn)CBGA |
| 供應(yīng)商設(shè)備封裝： | 783-FCPBGA（29x29） |
| 包裝： | 托盤 |
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Electrical Characteristics
MSC8256 Six-Core Digital Signal Processor Data Sheet, Rev. 6
Freescale Semiconductor
43
2.6.2.2
PCI Express AC Physical Layer Specifications
The AC requirements for PCI Express implementations have separate requirements for the Tx and Rx lines. The MSC8256
supports a 2.5 Gbps PCI Express interface defined by the PCI Express Base Specification, Revision 1.0a. The transmitter
specifications are defined in Table 25 and the receiver specifications are defined in Table 26. The parameters are specified at the
component pins. the AC timing specifications do not include REF_CLK jitter.
Note:
Specifications are valid at the recommended operating conditions listed in Table 3.
Table 25. PCI Express (2.5 Gbps) Differential Transmitter (Tx) Output AC Specifications
Parameter
Symbol
Min
Typical
Max
Units
Notes
Unit interval
UI
399.88
400.00
400.12
ps
1
Minimum Tx eye width
TTX-EYE
0.70
——UI
2, 3
Maximum time between the jitter median and
maximum deviation from the median.
TTX-EYE-MEDIAN-
to-MAX-JITTER
—
0.15
UI
3, 4
AC coupling capacitor
CTX
75
—
200
nF
5
Notes:
1.
Each UI is 400 ps ± 300 ppm. UI does not account for spread spectrum clock dictated variations. No test load is necessarily
associated with this value.
2.
The maximum transmitter jitter can be derived as TTX-MAX-JITTER = 1 – TTX-EYE = 0.3 UI.
3.
Specified at the measurement point into a timing and voltage compliance test load as shown in Figure 8 and measured over
any 250 consecutive Tx UIs. A TTX-EYE = 0.70 UI provides for a total sum of deterministic and random jitter budget of
TTX-JITTER-MAX = 0.30 UI for the transmitter collected over any 250 consecutive Tx UIs. The TTX-EYE-MEDIAN-to-MAX-JITTER
median is less than half of the total Tx jitter budget collected over any 250 consecutive Tx UIs. It should be noted that the
median is not the same as the mean. The jitter median describes the point in time where the number of jitter points on either
side is approximately equal as opposed to the averaged time value. Jitter is defined as the measurement variation of the
crossing points (VTX-DIFFp-p = 0 V) in relation to a recovered Tx UI. A recovered Tx UI is calculated over 3500 consecutive
unit intervals of sample data.
4.
Jitter is measured using all edges of the 250 consecutive UI in the center of the 3500 UI used for calculating the Tx UI.
5.
All transmitters shall be AC-coupled. The AC coupling is required either within the media or within the transmitting component
itself. The SerDes transmitter does not have built-in Tx capacitance. An external AC coupling capacitor is required.
Table 26. PCI Express (2.5 Gbps) Differential Receiver (Rx) Input AC Specifications
Parameter
Symbol
Min
Typical
Max
Units
Notes
Unit Interval
UI
399.88
400.00
400.12
ps
1
Minimum receiver eye width
TRX-EYE
0.4
—
UI
2, 3, 4
Maximum time between the jitter median
and maximum deviation from the median.
TRX-EYE-MEDIAN-to-MAX
-JITTER
—
0.3
UI
3, 4, 5
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| MSC8256TVT800B | 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC DSPStarcore 6-core RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
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