JTAG and In-System Programmability
2. Check ID—Before any program or verify process, the silicon ID is
checked. The time required to read this silicon ID is relatively small
compared to the overall programming time.
3. Sector Erase—Erasing the device in-system involves shifting in the
instruction to erase the device and applying an erase pulse(s). The
erase pulse is automatically generated internally by waiting in the
run/test/idle state for the specified erase pulse time of 500 ms for
the CFM block and 500 ms for each sector of the UFM block.
4. Program—Programming the device in-system involves shifting in
the address, data, and program instruction and generating the
program pulse to program the flash cells. The program pulse is
automatically generated internally by waiting in the run/test/idle
state for the specified program pulse time of 75 µs. This process is
repeated for each address in the CFM and UFM blocks.
5. Verify—Verifying a MAX II device in-system involves shifting in
addresses, applying the verify instruction to generate the read
pulse, and shifting out the data for comparison. This process is
repeated for each CFM and UFM address.
6. Exit ISP—An exit ISP stage ensures that the I/O pins transition
smoothly from ISP mode to user mode.
Table 3–4 shows the programming times for MAX II devices using
in-circuit testers to execute the algorithm vectors in hardware.
Software-based programming tools used with download cables are
slightly slower because of data processing and transfer limitations.
Table 3–4. MAX II Device Family Programming Times
EPM240 EPM570
EPM1270
EPM1270G EPM2210G
EPM2210
Description
EPM240G
EPM240Z
EPM570G
EPM570Z
Unit
Erase + Program (1 MHz)
Erase + Program (10 MHz)
Verify (1 MHz)
1.72
1.65
0.09
0.01
1.81
1.66
2.16
1.99
0.17
0.02
2.33
2.01
2.90
2.58
0.30
0.03
3.20
2.61
3.92
3.40
0.49
0.05
4.41
3.45
sec
sec
sec
sec
sec
sec
Verify (10 MHz)
Complete Program Cycle (1 MHz)
Complete Program Cycle (10 MHz)
Altera Corporation
December 2007
Core Version a.b.c variable
3–7
MAX II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
