参数资料
型号: EPCS1
厂商: Altera Corporation
英文描述: Serial Configuration Devices
中文描述: 串行配置器件
文件页数: 18/32页
文件大小: 236K
代理商: EPCS1
4–18
Configuration Handbook, Volume 2
Core Version a.b.c variable
Altera Corporation
July 2004
Serial Configuration Device Memory Access
Read Silicon ID Operation
The read silicon ID operation code is
b'1010 1011
, with the MSB listed
first. This operation reads the serial configuration device’s 8-bit silicon ID
from the
DATA
output pin. If this operation is shifted in during an erase
or write cycle, it will be ignored and have no effect on the cycle that is in
progress.
Table 4–11
shows the EPCS1 and EPCS4 device silicon IDs.
The device implements the read silicon ID operation by driving
nCS
low
then shifting in the read silicon ID operation code followed by three
dummy bytes on
ASDI
. The serial configuration device’s 8-bit silicon ID
is then shifted out on the
DATA
pin on the falling edge of
DCLK
, as shown
in
Figure 4–12
. The device can terminate the read silicon ID operation by
driving
nCS
high after the silicon ID has been read at least once. Sending
additional clock cycles on
DCLK
while
nCS
is driven low can cause the
silicon ID to be shifted out repeatedly.
Table 4–11. Serial Configuration Device Silicon ID
Serial Configuration Device
Silicon ID (Binary Value)
EPCS1
b'0001 0000
EPCS4
b'0001 0010
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