6.4 CONFIG4

Configuration Byte 4
Note:
  1. The higher voltage setting is recommended for an operation at or above 16 MHz.
Name: CONFIG4
Offset: 30 0003h

Bit 76543210 
 XINST LVPSTVRENPPS1WAYZCDBORV[1:0] 
Access R/WR/WR/WR/WR/WR/WR/W 
Reset 1111111 

Bit 7 – XINST Extended Instruction Set Enable

ValueDescription
1Extended Instruction Set and Indexed Addressing mode disabled (Legacy mode)
0Extended Instruction Set and Indexed Addressing mode enabled

Bit 5 – LVP Low-Voltage Programming Enable

The LVP bit cannot be written (to zero) while operating from the LVP programming interface. The purpose of this rule is to prevent the user from dropping out of LVP mode while programming from LVP mode, or accidentally eliminating LVP mode from the Configuration state.
ValueDescription
1Low-Voltage Programming enabled. MCLR/VPP pin function is MCLR. The MCLRE Configuration bit is ignored.
0HV on MCLR/VPP must be used for programming

Bit 4 – STVREN Stack Overflow/Underflow Reset Enable

ValueDescription
1Stack Overflow or Underflow will cause a Reset
0Stack Overflow or Underflow will not cause a Reset

Bit 3 – PPS1WAY PPSLOCKED One-Way Set Enable

ValueDescription
1The PPSLOCKED bit can only be set once after an unlocking sequence is executed; once PPSLOCK is set, all future changes to PPS registers are prevented
0The PPSLOCKED bit can be set and cleared as needed (unlocking sequence is required)

Bit 2 – ZCD ZCD Disable

ValueDescription
1ZCD disabled, ZCD can be enabled by setting the ZCDSEN bit of ZCDCON
0ZCD always enabled, PMDx[ZCDMD] bit is ignored

Bits 1:0 – BORV[1:0]  Brown-out Reset Voltage Selection(1)

ValueDescription
11Brown-out Reset Voltage (VBOR) set to 1.90V
10Brown-out Reset Voltage (VBOR) set to 2.45V
01Brown-out Reset Voltage (VBOR) set to 2.7V
00Brown-out Reset Voltage (VBOR) set to 2.85V
The higher voltage setting is recommended for an operation at or above 16 MHz.