Datasheet

57
32133D–11/2011
UC3D
8.9 Fuse Settings
The flash block contains 32 general purpose fuses. These 32 fuses can be found in the Flash
General Purpose Fuse Register Low (FGPFRLO). The Flash General Purpose Fuse Register
High (FGPFRHI) is not used. Some of these fuses have defined meanings outside the flash con-
troller and are described in this section.
In addition to the General Purpose fuses, parts of the flash user page can have a defined mean-
ing outside the flash controller and are described in this section.
The general purpose fuses are erased by a JTAG or aWire chip erase.
8.9.1 Flash General Purpose Fuse Register Low (FGPFRLO)
BODEN: Brown Out Detector Enable
BODHYST: Brown Out Detector Hysteresis
0: The Brown out detector hysteresis is disabled
1: The Brown out detector hysteresis is enabled
BODLEVEL: Brown Out Detector Trigger Level
This controls the voltage trigger level for the Brown out detector. Refer to ”Electrical Characteris-
tics” on page 716.
BOOTPROT, EPFL, LOCK
These are Flash Controller fuses and are described in the FLASHCDW section.
Reserved
31 30 29 28 27 26 25 24
BODEN BODHYST BODLEVEL[5:1]
23 22 21 20 19 18 17 16
BODLEVEL[0] Reserved Reserved Reserved BOOTPROT EPFL
15 14 13 12 11 10 9 8
LOCK[15:8]
7 6543210
LOCK[7:0]
BODEN Description
00 BOD disabled
01 BOD enabled, BOD reset enabled
10 BOD enabled, BOD reset disabled
11 Reserved