参数资料
型号: PC87393F-VJG
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 外设及接口
英文描述: 100-Pin LPC SuperI/O Devices for Portable Applications
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封装: TQFP-100
文件页数: 12/148页
文件大小: 1733K
代理商: PC87393F-VJG
7.0 X-Bus Extension (Continued)
109
www.national.com
Once a write cycle on the LPC falls within the range of any of the enabled decoded address ranges of the X-Bus functional
block, a write cycle begins. A write cycle (Figure 25) starts by outputting the address signals on address signals XA19-0,
and the data signals on data pins XD7-0, on the rising edge of the clock. One LPC clock cycle later, a chip select signals
XCS1 or 0 is asserted, based on the address accessed and the select signal mapping. Three clock cycles later, on the next
rising edge of the clock, the XWR signal is asserted (set to 0) indicating that this is a write cycle and enabling the device to
be written for 16 clock cycles plus the internally programmed wait state period. If XRDY use is enabled for this zone, XRDY
input value is then checked on the rising edge of the clock, and the transaction is extended until XRDY is detected to be high.
Five LPC clock cycles later, XWR is de-asserted (set to 1) and one clock cycle later, the transaction is completed by de-
asserting XCS1-0. Two clock cycle later, the address lines change their values to 0.
Figure 24. Read Access Cycle - Normal Address Mode
CLK
(Internal for
XD7-0
XA19-0
XCS1-0
XWR
Insert 12+”Programmed Wait States” of 33 MHz clocks here.
All non-clock signals remain the same during this inserted time.
XRD
XRDY
XD[7:0] (Data In)
(Data Read)
Reference)
相关PDF资料
PDF描述
PC906N 896 MHz - 940 MHz YAGI ANTENNA, 10.65 dBi GAIN, 65 deg 3dB BEAMWIDTH
PC926N 928 MHz - 960 MHz YAGI ANTENNA, 10.65 dBi GAIN, 65 deg 3dB BEAMWIDTH
PCA.1D.694.CNAD42Z CABLE TERMINATED, FEMALE, RF CONNECTOR, SOCKET
PCA.1D.694.CNAD42 CABLE TERMINATED, FEMALE, RF CONNECTOR, SOCKET
PCA.1D.694.CNAD52Z CABLE TERMINATED, FEMALE, RF CONNECTOR, SOCKET
相关代理商/技术参数
参数描述
PC87393VJG 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:IC, SUPER I/O DEVICE, TQFP-100, Logic Device Type:Buffer, Supply Voltage Min:3V,
PC87393-VJG 制造商:NSC 制造商全称:National Semiconductor 功能描述:100-Pin LPC SuperI/O Devices for Portable Applications
PC87410 制造商:NSC 制造商全称:National Semiconductor 功能描述:PC87410 PCI-IDE Interface Controller
PC87410VLK 制造商:Rochester Electronics LLC 功能描述:- Bulk
PC87413 制造商:NSC 制造商全称:National Semiconductor 功能描述:LPC ServerI/O for Servers and Workstations