9–46
Chapter 9: Using User Flash Memory in MAX II Devices
Simulation Parameters
Figure 9–52.
Memory Map for 8-Kbit Memory Initialization
MIF or HEX File Contents - to represent the
actual data and address size for the UFM Block
8-Kbit
altufm_i2c Megafunction
Logical Memory Contents
3FFh
Upper Quarter Addresses
300h to 3FFh
300h
2FFh
Mid-Upper Quarter Addresses
200h to 2FFh
200h
1FFh
Mid-Lower Quarter Addresses
100h to 1FFh
100h
0FFh
Lower Quarter Addresses
100h to 1FFh
000h
1FFh
The upper
quarter
of
logical memory maps
to the upper byte of
sector 1. Address 300h
in logical memory
maps to address 100h
in physical memory
and all addresses
follow the order in
logical memory.
100h
0FFh
The mid-lower
quarter
of
logical memory maps
to the lower byte of
sector 0. Address 100h
in logical memory
maps to address 000h
in physical memory
and all addresses
follow the order in
logical memory.
000h
Upper
8-bit
(byte)
The mid-upper
quarter
of
logical memory maps
to the lower byte of
sector 1. Address 200h
in logical memory
maps to address 100h
in physical memory
and all addresses
follow the order in
logical memory.
The lower
quarter
of
logical memory maps
to the lower byte of
sector 0. Address 000h
in logical memory
maps to address 000h
in physical memory
and all addresses
follow the order in
logical memory.
Lower
8-bit
(byte)
16-bit data in UFM
Padding Data into Memory Map
The altufm_i2c megafunction uses the upper 8 bits of the UFM 16-bit word; therefore,
the 8 least significant bit (LSB) should be padded with 1, as shown in
Figure 9–53.
Padding Data into Memory Map
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
8-bit valid
data to be placed
in the upper byte
Pad the lower byte
with
eight '1's
Simulation Parameters
shows page 4 of the altufm megafunction where you can
have an option to choose to simulate the OSC output port at the maximum or the
minimum frequency during the design simulation. The frequency chosen is only used
as the timing parameter for the Quartus II simulator and does not affect the real MAX
II device OSC output frequency.
Conclusion
The MAX II UFM block is a user-accessible, programmable non-volatile flash memory
block that provides significant flexibility in its interfacing. MAX II devices fill the
need for on-board non-volatile storage in any application, minimizing board space
and reducing total system cost.
ALTERA [ ALTERA CORPORATION ]
