参数资料
型号: ADSP-21489KSWZ-3A
厂商: Analog Devices Inc
文件页数: 30/68页
文件大小: 0K
描述: IC CCD SIGNAL PROCESSOR 100LQFP
标准包装: 1
系列: SHARC®
类型: 浮点
接口: EBI/EMI,DAI,I²C,SPI,SPORT,UART/USART
时钟速率: 350MHz
非易失内存: 外部
芯片上RAM: 5Mb
电压 - 输入/输出: 3.30V
电压 - 核心: 1.10V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 100-LQFP 裸露焊盘
供应商设备封装: 100-LQFP-EP(14x14)
包装: 托盘
Rev. B
|
Page 36 of 68
|
March 2013
Serial Ports
In slave transmitter mode and master receiver mode, the maxi-
mum serial port frequency is fPCLK/8. In master transmitter
mode and slave receiver mode, the maximum serial port clock
frequency is fPCLK/4. To determine whether communication is
possible between two devices at clock speed n, the following
specifications must be confirmed: 1) frame sync delay and frame
sync setup and hold; 2) data delay and data setup and hold; and
3) SCLK width.
Serial port signals (SCLK, frame sync, Data Channel A, Data
Channel B) are routed to the DAI_P20–1 pins using the SRU.
Therefore, the timing specifications provided below are valid at
the DAI_P20–1 pins.
Table 34. Serial Ports—External Clock
Parameter
Min
Max
Unit
Timing Requirements
tSFSE
1
Frame Sync Setup Before SCLK
(Externally Generated Frame Sync in either Transmit or Receive
Mode)
2.5
ns
tHFSE
1
Frame Sync Hold After SCLK
(Externally Generated Frame Sync in either Transmit or Receive
Mode)
2.5
ns
tSDRE
1
Receive Data Setup Before Receive SCLK
1.9
ns
tHDRE
1
Receive Data Hold After SCLK
2.5
ns
tSCLKW
SCLK Width
(tPCLK × 4) ÷ 2 – 1.5
ns
tSCLK
SCLK Period
tPCLK × 4
ns
Switching Characteristics
tDFSE
2
Frame Sync Delay After SCLK
(Internally Generated Frame Sync in either Transmit or Receive Mode)
10.25
ns
tHOFSE
2
Frame Sync Hold After SCLK
(Internally Generated Frame Sync in either Transmit or Receive Mode)
2
ns
tDDTE
2
Transmit Data Delay After Transmit SCLK
9
ns
tHDTE
2
Transmit Data Hold After Transmit SCLK
2
ns
1 Referenced to sample edge.
2 Referenced to drive edge.
Table 35. Serial Ports—Internal Clock
Parameter
Min
Max
Unit
Timing Requirements
tSFSI
1
Frame Sync Setup Before SCLK
(Externally Generated Frame Sync in either Transmit or Receive Mode)
7
ns
tHFSI
1
Frame Sync Hold After SCLK
(Externally Generated Frame Sync in either Transmit or Receive Mode)
2.5
ns
tSDRI
1
Receive Data Setup Before SCLK
7
ns
tHDRI
1
Receive Data Hold After SCLK
2.5
ns
Switching Characteristics
tDFSI
2
Frame Sync Delay After SCLK (Internally Generated Frame Sync in Transmit Mode)
4
ns
tHOFSI
2
Frame Sync Hold After SCLK (Internally Generated Frame Sync in Transmit Mode)
–1
ns
tDFSIR
2
Frame Sync Delay After SCLK (Internally Generated Frame Sync in Receive Mode)
9.75
ns
tHOFSIR
2
Frame Sync Hold After SCLK (Internally Generated Frame Sync in Receive Mode)
–1
ns
tDDTI
2
Transmit Data Delay After SCLK
3.25
ns
tHDTI
2
Transmit Data Hold After SCLK
–2
ns
tSCKLIW
Transmit or Receive SCLK Width
2 × tPCLK – 1.5
2 × tPCLK + 1.5 ns
1 Referenced to the sample edge.
2 Referenced to drive edge.
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