XC3S400AN-4FTG256I Xilinx Inc, XC3S400AN-4FTG256I Datasheet - Page 57

• Manufacturer Part Number: XC3S400AN-4FTG256I
• Description: IC FPGA SPARTAN-3AN 256FTBGA
• Manufacturer: Xilinx Inc
• Series: Spartan™-3ANr

Specifications of XC3S400AN-4FTG256I

• Number Of Logic Elements/cells: 8064
• Number Of Labs/clbs: 896
• Total Ram Bits: 368640
• Number Of I /o: 195
• Number Of Gates: 400000
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 256-LBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Sector Erase
Spartan-3AN FPGA In-System Flash User Guide
UG333 (v2.1) January 15, 2009
R
The Sector Erase command erases any unprotected, unlocked sector in the main memory,
as shown in
To perform a Sector Erase command, the FPGA application must perform the following
actions.
•
•
Table 5-9: Sector Erase (0x7C) Command
•
Notes:
1. : The Sector Erase command is supported in simulation.
Command
Drive CSB Low while CLK is High or on the rising edge of CLK.
On the falling edge of CLK, serially clock in the appropriate Block Erase command
code, 0x7C, most-significant bit first, as shown in
Similarly, serially clock in a 24-bit sector address.
♦
0x7C
Sector 0 is different than all other sectors.
-
-
Sector Erase
MOSI
MISO
CSB
CLK
Sector 0 is subdivided into two subsectors called Sector 0a and Sector 0b.
Sector 0a and Sector 0b are each erased individually and require a unique
address with additional addressing bits, different than all the other sectors.
Figure
A Sector Erase command will not
erase a sector that is protected by
Sector Protect or Sector Lockdown
SPI_ACESS
5-3. Only one sector can be erased at one time.
Default Addressing: See
Optional Power-of-2 Addressing: See
Table A-6, page 90
Full Address Map, including bitstream
locations: See
(0x7C)
High Address
Figure 5-3: Sector Erase Command
www.xilinx.com
Table 5-11
Block Address
and
Table 5-10
Sector 0 is subdivided
into Sector 0a and
Sector 0b
Middle Address
24-bit Address
Selected sector is erased. Other
sectors are unaffected.
Table
READY/BUSY
Status Register
5-12.
7
0 = Sector Erase in progress
1 = Sector is now erased
Table
Flash Memory Array
T
6
SE
5-9.
5
= 2.5 to 5 seconds
4
Byte Address Unused
3
Sector address
UG333_c5_03_022307
Low Address
2
Don’t Care
1
Sector Erase
XX
0
57