PIC16F1938 Datasheet, PDF (60/452 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers

PIC16(L)F1938/9
REGISTER 4-2: CONFIGURATION WORD 2
R/P-1/1
R/P-1/1
U-1
LVP⁽¹⁾
DEBUG⁽³⁾
—
bit 13
R/P-1/1
BORV
R/P-1/1
STVREN
R/P-1/1
PLLEN
U-1
—
bit 7
U-1
R/P-1/1
R/P-1/1
U-1
—
VCAPEN<1:0>⁽²⁾
—
bit 6
U-1
R/P-1/1
R/P-1/1
—
WRT1
WRT0
bit 0
Legend:
R = Readable bit
‘0’ = Bit is cleared
P = Programmable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘1’
-n = Value when blank or after Bulk Erase
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
bit 7-6
bit 5-4
bit 3-2
bit 1-0
LVP: Low-Voltage Programming Enable bit⁽¹⁾
1 = Low-voltage programming enabled
0 = High-voltage on MCLR/VPP must be used for programming
DEBUG: In-Circuit Debugger Mode bit⁽³⁾
1 = In-Circuit Debugger disabled, RB6/ICSPCLK and RB7/ICSPDAT are general purpose I/O pins
0 = In-Circuit Debugger enabled, RB6/ICSPCLK and RB7/ICSPDAT are dedicated to the debugger
Unimplemented: Read as ‘1’
BORV: Brown-out Reset Voltage Selection bit
1 = Brown-out Reset voltage set to 1.9V
0 = Brown-out Reset voltage set to 2.5V
STVREN: Stack Overflow/Underflow Reset Enable bit
1 = Stack Overflow or Underflow will cause a Reset
0 = Stack Overflow or Underflow will not cause a Reset
PLLEN: PLL Enable bit
1 = 4xPLL enabled
0 = 4xPLL disabled
Unimplemented: Read as ‘1’
VCAPEN<1:0>: Voltage Regulator Capacitor Enable bits⁽²⁾
00 = VCAP functionality is enabled on RA0
01 = VCAP functionality is enabled on RA5
10 = VCAP functionality is enabled on RA6
11 = No capacitor on VCAP pin
Unimplemented: Read as ‘1’
WRT<1:0>: Flash Memory Self-Write Protection bits
16 kW Flash memory:
11 = Write protection off
10 = 000h to 1FFh write-protected, 200h to 3FFFh may be modified by EECON control
01 = 000h to 1FFFh write-protected, 2000h to 3FFFh may be modified by EECON control
00 = 000h to 3FFFh write-protected, no addresses may be modified by EECON control
Note 1:
2:
3:
The LVP bit cannot be programmed to ‘0’ when Programming mode is entered via LVP.
Reads as ‘11’ on PIC16F1938/1939 only.
The DEBUG bit in Configuration Word is managed automatically by device development tools including
debuggers and programmers. For normal device operation, this bit should be maintained as a ‘1’.
DS41574A-page 60
Preliminary
 2011 Microchip Technology Inc.