收藏本站
CoreU1PHY – UTOPIA Level 1 PHY Interface
Read Interface (egress)
When r_avail is asserted high at the user interface and
the u1_rx_en signal is asserted low by the link-layer, the
CoreU1PHY will begin accepting data on the user
interface. Once a cell transfer has begun, the CoreU1PHY
will transfer 27 words of data regardless of the state of
r_avail. The CoreU1PHY asserts r_buf_en high, expecting
to accept data at the r_data inputs on the next rising-
edge of u1_rx_clk as illustrated in Figure 10 .
U1_rx_cl
U1_rx_cla
U1_rx_en
U1_rx_soc
accepted on the following rising edge of u1_rx_clk, and
the r_adr is incremented.
Then r_buf_en is de-asserted for one clock cycle except
after the third data word when xlate is low (53-byte
mode), or when a back-to-back read operation is needed
in order to get the first payload byte in time.
The cycle is repeated until r_adr reaches 1B hex and the
last two bytes of the ATM cell are sent. At this point,
r_adr is reset to 00 hex, and if r_avail indicates that
another cell is immediately available, and u1_rx_en
remains low, the CoreU1PHY will immediately begin
sending the next cell as shown in Figure 11 . Otherwise,
r_buf_en remains low until the CoreU1PHY begins to
transmit another cell.
U1_rx_cl
U1_rx_data
XX
H1
H2
H3
H4
H5
P1
P2
U1_rx_clav
r_buf_en
U1_rx_en
r_adr
00
01
02
03
04
U1_rx_soc
r_data
XX
H1H2
H3H4
H5H6
P1P2
U1_rx_data
P47 P48
H1
H2
H3
H4
H5
P1
P2
Figure 10 ? Read Interface Cell Transfer
The CoreU1PHY provides r_adr as a word count (00 to 1B
R_avail
r_buf_en
hex) and increments whenever the core accepts data at
the r_data pins. Since the CoreU1PHY translates from 16-
bit data at the user interface to 8-bit data at the UTOPIA
r_adr 1B
r_data
00
XX
01
H1H2
02
H3H4
03
H5H6
04
P1P2
interface, r_buf_en is asserted for one clock cycle, data is
Figure 11 ? Back-to-Back Read Cell Transfer
v4.0
5
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
CORR-8BIT-XM-UT2 SITE LICENSE IP CORRELATOR XP
CP2-GSA-L CONN SHIELD LOWER TYPE A 22
CP2-HSA110-1 CONN SHROUD CPCI 2MM TYPE A 22
CP2-HSC055-4 CONN SHROUD CPCI 2MM TYPE C 11
CP2-K3567-SR-F COMPACT PCI - MISC
CP2105EK KIT EVAL FOR CP2105
CP881 CONN BNC PLUG CRIMP RG-58
CP882 CONN BNC PLUG CRIMP RG-59,62
相关代理商/技术参数
COREU1PHY-EV 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreU1PHY - UTOPIA Level 1 PHY Interface
COREU1PHY-SN 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreU1PHY - UTOPIA Level 1 PHY Interface
COREU1PHY-SR 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreU1PHY - UTOPIA Level 1 PHY Interface
COREU1PHY-UR 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreU1PHY - UTOPIA Level 1 PHY Interface
COREU1PHY-XX 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:CoreU1PHY - UTOPIA Level 1 PHY Interface
COREWARE 制造商:未知厂家 制造商全称:未知厂家 功能描述:CoreWare Merlin2 Fibre Channel core family
CORL-8P 功能描述:Connector 制造商:hirose electric co ltd 系列:* 零件状态:过期 标准包装:1
CORL-8S 功能描述:Connector 制造商:hirose electric co ltd 系列:* 零件状态:过期 标准包装:1