EPM2210GF256I5N Altera, EPM2210GF256I5N Datasheet - Page 32

• Manufacturer Part Number: EPM2210GF256I5N
• Description: MAX II
• Manufacturer: Altera

User Flash Memory Block
2–24Core Version a.b.c variable
MAX II Device Handbook, Volume 1
f
UFM Storage
Each device stores up to 8,192 bits of data in the UFM block.
shows the data size, sector, and address sizes for the UFM block.
There are 512 locations with 9-bit addressing ranging from 000h to 1FFh.
Sector 0 address space is 000h to 0FFh and Sector 1 address space is from
100h to 1FFh. The data width is up to 16 bits of data. The Quartus II
software automatically creates logic to accommodate smaller read or
program data widths. Erasure of the UFM involves individual sector
erasing (that is, one erase of sector 0 and one erase of sector 1 is required
to erase the entire UFM block). Since sector erase is required before a
program or write, having two sectors enables a sector size of data to be
left untouched while the other sector is erased and programmed with
new data.
Internal Oscillator
As shown in
contains an oscillator. The dedicated circuitry uses this internally for its
read and program operations. This oscillator's divide by 4 output can
drive out of the UFM block as a logic interface clock source or for
general-purpose logic clocking. The typical OSC output signal frequency
ranges from 3.3 to 5.5 MHz, and its exact frequency of operation is not
programmable.
Program, Erase, and Busy Signals
The UFM block’s dedicated circuitry automatically generates the
necessary internal program and erase algorithm once the PROGRAM or
ERASE input signals have been asserted. The PROGRAM or ERASE signal
must be asserted until the busy signal deasserts, indicating the UFM
internal program or erase operation has completed. The UFM block also
supports JTAG as the interface for programming and/or reading.
For more information about programming and erasing the UFM block,
refer to the
MAX II Device Handbook.
EPM240
EPM570
EPM1270
EPM2210
Table 2–3. UFM Array Size
Device
Using User Flash Memory in MAX II Devices
Figure
Total Bits
8,192
2–15, the dedicated circuitry within the UFM block
(4,096 bits/sector)
Sectors
2
Address Bits
9
Altera Corporation
chapter in the
Table 2–3
Data Width
March 2008
16