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EPCS1 数据表(PDF) 23 Page - Altera Corporation

部件名 EPCS1
功能描述  Serial Configuration Devices
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制造商  ALTERA [Altera Corporation]
网页  http://www.altera.com
标志 ALTERA - Altera Corporation

EPCS1 数据表(HTML) 23 Page - Altera Corporation

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Altera Corporation
Core Version a.b.c variable
4–23
July 2004
Configuration Handbook, Volume 2
Serial Configuration Devices (EPCS1, EPCS4, EPCS16 & EPCS64) Data Sheet
The erase sector operation is implemented by first driving
nCS low, then
shifting in the erase sector operation code and the three address bytes of
the chosen sector on the
ASDI pin. The three address bytes for the erase
sector operation can be any address inside the specified sector. (See
Tables 4–6 and 4–7 for sector address range information.) Drive
nCS high
after the eighth bit of the erase sector operation code has been latched in.
Figure 4–15 shows the timing diagram.
Immediately after the device drives
nCS high, the self-timed erase sector
cycle is initiated. The self-timed erase sector cycle usually takes 2 s for
EPCS1 and EPCS4 devices and is guaranteed to be less than 3 s for both
serial configuration devices. You must account for this amount of delay
before the memory contents can be accessed. Alternatively, you can check
the write in progress bit in the status register by executing the read status
operation while the erase cycle is in progress. The write in progress bit is
1 during the self-timed erase cycle and is 0 when it is complete. The write
enable latch bit in the status register is reset to
0 before the erase cycle is
complete.
Figure 4–15. Erase Sector Operation Timing Diagram
Power &
Operation
This section describes the power modes, power-on reset (POR) delay,
error detection, and initial programming state of serial configuration
devices.
Power Mode
Serial configuration devices support active power and standby power
modes. When
nCS is low, the device is enabled and is in active power
mode. The FPGA is configured while in active power mode. When
nCS is
high, the device is disabled but could remain in active power mode until
all internal cycles have completed (such as write or erase operations). The
serial configuration device then goes into stand-by power mode. The ICC1
nCS
DCLK
ASDI
01234567
8
9
28
29
30
31
Operation Code
24-Bit Address
23
22
3
2
1
0
MSB


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