参数资料
型号: ADSP-21160NKB-100
厂商: Analog Devices Inc
文件页数: 28/48页
文件大小: 0K
描述: IC DSP CONTROLLER 32BIT 400BGA
产品培训模块: SHARC Processor Overview
标准包装: 1
系列: SHARC®
类型: 浮点
接口: 主机接口,连接端口,串行端口
时钟速率: 100MHz
非易失内存: 外部
芯片上RAM: 512kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.90V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 400-BBGA
供应商设备封装: 400-PBGA(27x27)
包装: 托盘
ADSP-21160N
–34–
REV. 0
Link Ports —Receive, Transmit
For Link Ports, see Table 19, Table 20, Figure 22, and
Figure 23. Calculation of link receiver data setup and hold,
relative to link clock, is required to determine the maximum
allowable skew that can be introduced in the transmission path,
between LDATA and LCLK. Setup skew is the maximum delay
that can be introduced in LDATA, relative to LCLK (setup
skew = tLCLKTWH minimum – tDLDCH –tSLDCL). Hold skew is the
maximum delay that can be introduced in LCLK, relative to
LDATA (hold skew = tLCLKTWL minimum + tHLDCH –tHLDCL). Cal-
culations made directly from speed specifications result in
unrealistically small skew times, because they include multiple
tester guardbands.
Note that there is a two-cycle effect latency between the link port
enable instruction and the DSP enabling the link port.
Table 19. Link Ports—Receive
Parameter
Min
Max
Unit
Timing Requirements
tSLDCL
Data Setup Before LCLK Low
2.5
ns
tHLDCL
Data Hold After LCLK Low
3
ns
tLCLKIW
LCLK Period
tLCLK
ns
tLCLKRWL
LCLK Width Low
4
ns
tLCLKRWH
LCLK Width High
4
ns
Switching Characteristics
tDLALC
LACK Low Delay After LCLK High
1
917
ns
1 LACK goes low with tDLALC relative to rise of LCLK after first nibble, but does not go low if the receiver’s link buffer is not about to fill.
Table 20. Link Ports—Transmit
Parameter
Min
Max
Unit
Timing Requirements
tSLACH
LACK Setup Before LCLK High
14
ns
tHLACH
LACK Hold After LCLK High
–2
ns
Switching Characteristics
tDLDCH
Data Delay After LCLK High
4
ns
tHLDCH
Data Hold After LCLK High
–2
ns
tLCLKTWL
LCLK Width Low
0.5tLCLK –.5
0.5tLCLK+.5
ns
tLCLKTWH
LCLK Width High
0.5tLCLK –.5
0.5tLCLK+.5
ns
tDLACLK
LCLK Low Delay After LACK High
0.5tLCLK+4
3/2tLCLK+11
ns
Figure 22. Link Ports—Receive
LCLK
LDAT(7:0)
LACK (OUT)
RECEIVE
IN
tSLDCL
tHLDCL
tLCLKRWH
tDLALC
tLCLKRWL
tLCLKIW
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