Microchip Technology AC164139 Data Sheet
PIC24FJ256DA210 FAMILY
DS39969B-page 348
2010 Microchip Technology Inc.
REGISTER 27-1:
CW1: FLASH CONFIGURATION WORD 1
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
bit 23
bit 16
r-x
R/PO-1
R/PO-1
R/PO-1
R/PO-1
r-1
R/PO-1
R/PO-1
reserved
JTAGEN
GCP
GWRP
DEBUG
reserved
ICS1
ICS0
bit 15
bit 8
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
FWDTEN
WINDIS
ALTVREF
(1)
FWPSA
WDTPS3
WDTPS2
WDTPS1
WDTPS0
bit 7
bit 0
Legend:
r = Reserved 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 23-16
Unimplemented: Read as ‘1’
bit 15
Reserved: The value is unknown; program as ‘0’
bit 14
JTAGEN: JTAG Port Enable bit
1
= JTAG port is enabled
0
= JTAG port is disabled
bit 13
GCP: General Segment Program Memory Code Protection bit
1
= Code protection is disabled
0
= Code protection is enabled for the entire program memory space
bit 12
GWRP: General Segment Code Flash Write Protection bit
1
= Writes to program memory are allowed
0
= Writes to program memory are not allowed
bit 11
DEBUG: Background Debugger Enable bit
1
= Device resets into Operational mode
0
= Device resets into Debug mode
bit 10
Reserved: Always maintain as ‘1’
bit 9-8
ICS<1:0>: Emulator Pin Placement Select bits
11
= Emulator functions are shared with PGEC1/PGED1
10
= Emulator functions are shared with PGEC2/PGED2
01
= Emulator functions are shared with PGEC3/PGED3
00
= Reserved; do not use
bit 7
FWDTEN: Watchdog Timer Enable bit
1
= Watchdog Timer is enabled
0
= Watchdog Timer is disabled
bit 6
WINDIS: Windowed Watchdog Timer Disable bit
1
= Standard Watchdog Timer is enabled
0
= Windowed Watchdog Timer is enabled; FWDTEN must be ‘1’
bit 5
ALTVREF: Alternate V
REF
Pin Selection bit
(1)
1
= V
REF
is on a default pin (V
REF
+ on RA10 and V
REF
- on RA9)
0
= V
REF
is on an alternate pin (V
REF
+ on RB0 and V
REF
- on RB1)
Note 1:
Unimplemented in 64-pin devices, maintain at ‘1’ (V
REF
+ on RB0 and V
REF
- on RB1).