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| 型号： | XC3020A7PC68I |
| 厂商： | Xilinx, Inc. |
| 英文描述： | IC-SMD-FPGA |
| 中文描述： | 集成电路贴片的FPGA |
| 文件页数： | 20/76页 |
| 文件大小： | 731K |
| 代理商： | XC3020A7PC68I |
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R
November 9, 1998 (Version 3.1)
7-29
XC3000 Series Field Programmable Gate Arrays
7
Peripheral Mode
Peripheral mode uses the trailing edge of the logic AND
condition of the CS0, CS1, CS2, and WS inputs to accept
byte-wide data from a microprocessor bus. In the lead
FPGA, this data is loaded into a double-buffered UART-like
parallel-to-serial converter and is serially shifted into the
internal logic. The lead FPGA presents the preamble data
(and all data that overflows the lead device) on the DOUT
pin.
The Ready/Busy output from the lead device acts as a
handshake signal to the microprocessor. RDY/BUSY goes
Low when a byte has been received, and goes High again
when the byte-wide input buffer has transferred its informa-
tion into the shift register, and the buffer is ready to receive
new data. The length of the BUSY signal depends on the
activity in the UART. If the shift register had been empty
when the new byte was received, the BUSY signal lasts for
only two CCLK periods. If the shift register was still full
when the new byte was received, the BUSY signal can be
as long as nine CCLK periods.
Note that after the last byte has been entered, only seven
of its bits are shifted out. CCLK remains High with DOUT
equal to bit 6 (the next-to-last bit) of the last byte entered.
X5991
ADDRESS
BUS
DATA
BUS
D0–7
ADDRESS
DECODE
LOGIC
CS0
...
RDY/BUSY
WS
RESET
...
OTHER
I/O PINS
D0–7
CCLK
DOUT
M2
HDC
LDC
FPGA
GENERAL-
PURPOSE
USER I/O
PINS
D/P
M0
M1 PWR
DWN
+5 V
CS2
CS1
CONTROL
SIGNALS
8
INIT
REPROGRAM
+5 V
5 k
*
IF READBACK IS
ACTIVATED, A
5-k
RESISTOR IS
REQUIRED IN SERIES
WITH M1
*
OPTIONAL
DAISY-CHAINED
FPGAs WITH DIFFERENT
CONFIGURATIONS
OC
Figure 27: Peripheral Mode Circuit Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XC3020A-7PC68I | 制造商:XILINX 制造商全称:XILINX 功能描述:Field Programmable Gate Arrays (XC3000A/L, XC3100A/L) |
| XC3020A-7PC84C | 功能描述:IC LOGIC CL ARRAY 2000GAT 84PLCC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - FPGA（现场可编程门阵列） 系列:XC3000A/L 产品变化通告:XC4000(E,L) Discontinuation 01/April/2002 标准包装:24 系列:XC4000E/X LAB/CLB数:100 逻辑元件/单元数:238 RAM 位总计:3200 输入/输出数:80 门数:3000 电源电压:4.5 V ~ 5.5 V 安装类型:表面贴装 工作温度:-40°C ~ 100°C 封装/外壳:120-BCBGA 供应商设备封装:120-CPGA（34.55x34.55） |
| XC3020A-7PC84C0100 | 制造商:Xilinx 功能描述: |
| XC3020A-7PC84I | 制造商:Xilinx 功能描述: |
| XC3020A-7PCG68C | 制造商:Xilinx 功能描述: |
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