Microchip Technology ARD00385 Data Sheet
PIC18F87K90 FAMILY
DS39957D-page 432
2009-2011 Microchip Technology Inc.
REGISTER 28-7:
CONFIG4L: CONFIGURATION REGISTER 4 LOW (BYTE ADDRESS 300006h)
R/P-1
U-0
U-0
R/P-0
U-0
R/P-0
U-0
R/P-1
DEBUG
—
—
BBSIZ0
—
—
—
STVREN
bit 7
bit 0
Legend:
P = Programmable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
DEBUG:
Background Debugger Enable bit
1
= Background debugger is disabled, RB6 and RB7 are configured as general purpose I/O pins
0
= Background debugger is enabled, RB6 and RB7 are dedicated to In-Circuit Debug
bit 6-5
Unimplemented:
Read as ‘0’
bit 4
BBSIZ<0>:
Boot Block Size Select bit
1
= 2 kW boot block size
0
= 1 kW boot block size
bit 3-1
Unimplemented:
Read as ‘0’
bit 0
STVREN:
Stack Full/Underflow Reset Enable bit
1
= Stack full/underflow will cause a Reset
0
= Stack full/underflow will not cause a Reset