4. Jumper Setting
34
SPI-8550-LLVAS
BIOS Write Protect & Top Block Lock setting:
JP2
Write Protect:
When enabled, prevents programming or block erase to all but the highest addressable block (0-6 in a
4-Mbit, 0-14 in an 8-Mbit component), regardless of the state of the corresponding lock registers. When
disabled then hardware write protection for these blocks, though register-based protection still applies.
Top Block Lock:
When enabled, it prevents programming or block erase to the highest addressable block (7 in a 4-Mbit,
15 in an 8-Mbit component), regardless of the state of the lock register. When disabled, then hardware
write protection for the top block, though register-based protection still applies.
Table 4.3.
Top Block Lock
JP2
Function
Write protect Disabled *
Write protect Enabled
Top Block Lock Disabled *
Top Block Lock Enabled
2
4
6
1
3
5
2
4
6
1
3
5
2
4
6
1
3
5
2
4
6
1
3
5
* Default: Disabled
Summary of Contents for SPI-8550-LLVAS
Page 7: ...vi SPI 8550 LLVAS...
Page 13: ...1 Introduction 6 SPI 8550 LLVAS...
Page 19: ...2 System Reference 12 SPI 8550 LLVAS...
Page 47: ...4 Jumper Setting 40 SPI 8550 LLVAS...
