Datasheet

PIC24FJ64GA104 FAMILY
DS39951C-page 240  2010 Microchip Technology Inc.
REGISTER 25-1: CW1: FLASH CONFIGURATION WORD 1
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
r-x R/PO-1 R/PO-1 R/PO-1 R/PO-1 U-1 R/PO-1 R/PO-1
rJTAGEN
(1)
GCP GWRP DEBUG
—
ICS1 ICS0
bit 15 bit 8
R/PO-1R/PO-1 U-1 R/PO-1R/PO-1R/PO-1R/PO-1R/PO-1
FWDTEN WINDIS
— FWPSA WDTPS3 WDTPS2 WDTPS1 WDTPS0
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit PO = Program Once bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed ‘1’ = Bit is set ‘0’ = Bit is cleared
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)
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 disabled
bit 11 DEBUG
: Background Debugger Enable bit
1 = Device resets into Operational mode
0 = Device resets into Debug mode
bit 10 Unimplemented: Read 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 Unimplemented: Read as ‘1’
bit 4 FWPSA: WDT Prescaler Ratio Select bit
1 = Prescaler ratio of 1:128
0 = Prescaler ratio of 1:32
Note 1: The JTAGEN bit can only be modified using In-Circuit Serial Programming™ (ICSP™). It cannot be
modified while connected through the JTAG interface.