Datasheet

 2009-2011 Microchip Technology Inc. DS39957D-page 431
PIC18F87K90 FAMILY
REGISTER 28-5: CONFIG3L: CONFIGURATION REGISTER 3 LOW (BYTE ADDRESS 300004h)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/P-1
— — — — — — —RTCOSC
bit 7 bit 0
Legend: P = Programmable 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 7-1
Unimplemented: Read as ‘0’
bit 0
RTCOSC: RTCC Reference Clock Select bit
1 = RTCC uses SOSC as a reference clock
0 = RTCC uses LF-INTOSC as a reference clock
REGISTER 28-6: CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h)
R/P-1 U-0 U-0 U-0 R/P-1 U-0 R/P-1 R/P-1
MCLRE
— — — MSSPMSK — ECCPMX
(1)
CCP2MX
bit 7 bit 0
Legend: P = Programmable 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 7
MCLRE: MCLR Pin Enable bit
1 = MCLR pin is enabled; RG5 input pin is disabled
0 = RG5 input pin is enabled; MCLR is disabled
bit 6-4
Unimplemented: Read as ‘0’
bit 3
MSSPMSK: MSSP V3 7-Bit Address Masking Mode Enable bit
1 = 7-Bit Address Masking mode is enabled
0 = 5-Bit Address Masking mode is enabled
bit 2
Unimplemented: Read as ‘0’
bit 1
ECCPMX: ECCP MUX bit
(1)
1 = Enhanced ECCP1 (P1B/P1C) is multiplexed onto RE6 and RE5, CCP6 onto RE6 and CCP7 onto RE5
Enhanced ECCP3 (P3B/P3C) is multiplexed onto RE4 and RE3, CCP8 onto RE4 and CCP9 onto RE3
0 = Enhanced ECCP1 (P1B/P1C) is multiplexed onto RH7 and RH6, CCP6 onto RH7 and CCP7 onto RH6
Enhanced ECCP3 (P3B/P3C) is multiplexed onto RH5 and RH4, CCP8 onto RH5 and CCP9 onto RH4
bit 0
CCP2MX: ECCP2 MUX bit
1 = ECCP2 is multiplexed with RC1
0 = ECCP2 input/output is multiplexed with RE7
(1)
Note 1: This feature is only available on 80-pin devices.