Chapter 7: User Flash Memory in MAX V Devices
7–29
Software Support for UFM Block
4. nCSis pulled back to high.
For SPI Base mode, the SE instruction erases UFM sector 0. Because there are no
choices of UFM sectors to be erased, there is no address component to this instruction.
The SEoperation is always done through the following sequence in SPI Base mode:
1. nCSis pulled low.
2. Opcode 00100000is transmitted into the interface.
3. nCSis pulled back to high.
Figure 7–25. SECTOR-ERASE Operation Sequence for Extended Mode
nCS
0
1
2
3
4
5
6
7
8
9
10 11
20 21 22 23
SCK
SI
8-bit
Instruction
16-bit
Address
20H
MSB
MSB
High Impedance
SO
Figure 7–26 shows the SECTOR-ERASEoperation sequence for Base mode.
Figure 7–26. SECTOR_ERASE Operation Sequence for Base Mode
nCS
0
1
2
3
4
5 6 7
SCK
SI
8-bit
Instruction
20H
MSB
High Impedance
SO
January 2011 Altera Corporation
MAX V Device Handbook
ALTERA [ ALTERA CORPORATION ]
