![](http://datasheet.mmic.net.cn/Microchip-Technology/PIC32MX250F128D-I-ML_datasheet_99580/PIC32MX250F128D-I-ML_233.png)
2011-2012 Microchip Technology Inc.
Preliminary
DS61168D-page 233
PIC32MX1XX/2XX
REGISTER 26-5:
CFGCON: CONFIGURATION CONTROL REGISTER
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0
—
23:16
U-0
—
15:8
U-0
R/W-0
U-0
—
—IOLOCK(1) PMDLOCK(1)
—
7:0
U-0
R/W-1
U-0
U-1
R/W-1
—
—JTAGEN
—
—TDOEN
Legend:
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 31-14 Unimplemented: Read as ‘0’
bit 13
IOLOCK: Peripheral Pin Select Lock bit(1)
1 = Peripheral Pin Select is locked. Writes to PPS registers is not allowed.
0 = Peripheral Pin Select is not locked. Writes to PPS registers is allowed.
bit 12
PMDLOCK: Peripheral Module Disable bit(1)
1 = Peripheral module is locked. Writes to PMD registers is not allowed.
0 = Peripheral module is not locked. Writes to PMD registers is allowed.
bit 11-4
Unimplemented: Read as ‘0’
bit 3
JTAGEN: JTAG Port Enable bit
1 = Enable the JTAG port
0 = Disable the JTAG port
bit 2-1
Unimplemented: Read as ‘1’
bit 0
TDOEN: TDO Enable for 2-Wire JTAG
1 = 2-wire JTAG protocol uses TDO
0 = 2-wire JTAG protocol does not use TDO
Note 1: To change this bit, the unlock sequence must be performed. Refer to Section 6. “Oscillator” (DS61112)
in the “PIC32 Family Reference Manual” for details.