Chapter 2: MAX II Architecture
2–19
User Flash Memory Block
■
■
Auto-increment addressing
Serial interface to logic array with programmable interface
Figure 2–15. UFM Block and Interface Signals
UFM Block
PROGRAM
ERASE
RTP_BUSY
BUSY
Program
Erase
Control
_
:
OSC
4
OSC_ENA
OSC
UFM Sector 1
UFM Sector 0
9
ARCLK
Address
Register
16
16
ARSHFT
ARDin
DRDin
Data Register
DRDout
DRCLK
DRSHFT
UFM Storage
Each device stores up to 8,192 bits of data in the UFM block. Table 2–3 shows the data
size, sector, and address sizes for the UFM block.
Table 2–3. UFM Array Size
Device
EPM240
EPM570
EPM1270
EPM2210
Total Bits
Sectors
Address Bits
Data Width
8,192
2
9
16
(4,096 bits/sector)
There are 512 locations with 9-bit addressing ranging from 000hto 1FFh. Sector 0
address space is 000hto 0FFhand Sector 1 address space is from 100hto 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.
© October 2008 Altera Corporation
MAX II Device Handbook
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