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: 11/32页
文件大小: 236K
代理商: EPCS1
Altera Corporation
July 2004
Core Version a.b.c variable
4–11
Configuration Handbook, Volume 2
Serial Configuration Devices (EPCS1, EPCS4, EPCS16 & EPCS64) Data Sheet
All attempts to access the memory contents while a write or erase cycle is
in progress will not be granted, and the write or erase cycle will continue
unaffected.
Write Enable Operation
The write enable operation code is
b'0000 0110
, and the most
significant bit is listed first. The write enable operation sets the write
enable latch bit, which is bit 1 in the status register. Always set the write
enable latch bit before write bytes, write status, erase bulk, and erase
sector operations.
Figure 4–5
shows the timing diagram for the write
enable operation.
Figures 4–7
and
4–8
show the status register bit
definitions.
Table 4–8. Operation Codes for Serial Configuration Devices
Operation
Operation Code
(1)
Address Bytes
Dummy Bytes
Data Bytes
DCLK f
MAX
(MHz)
Write enable
0000 0110
0
0
0
25
Write disable
0000 0100
0
0
0
25
Read status
0000 0101
0
0
1 to infinite
(2)
25
Read bytes
0000 0011
3
0
1 to infinite
(2)
20
Read silicon ID
1010 1011
0
3
1 to infinite
(2)
25
Write status
0000 0001
0
0
1
25
Write bytes
0000 0010
3
0
1 to 256
(3)
25
Erase bulk
1100 0111
0
0
0
25
Erase sector
1101 1000
3
0
0
25
Notes to
Table 4–8
:
(1)
The MSB is listed first and the least significant bit (LSB) is listed last.
(2)
The status register, data or silicon ID are read out at least once on the
DATA
pin and will continuously be read out
until
nCS
is driven high
(3)
Write bytes operation requires at least one data byte on the
DATA
pin. If more than 256 bytes are sent to the device,
only the last 256 bytes are written to the memory.
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