Datasheet

 2010-2013 Microchip Technology Inc. DS40001430E-page 59
PIC16(L)F720/721
FIGURE 6-10: BLOCK DIAGRAM OF RB7
I/O Pin
VDD
VSS
D
Q
CK
Q
D
Q
CK
Q
D
Q
CK
Q
D
Q
CK
Q
VDD
D
EN
Q
D
EN
Q
Weak
Data Bus
WR
WPUB
RD
WPUB
RD PORTB
RD
PORTB
WR
PORTB
WR
TRISB
RD
TRISB
WR
IOCB
RD
IOCB
Interrupt-on-
RABPU
Change
Q3
SPEN
TXEN
CK
TX
SYNC
AUSART
AUSART
0
1
1
0
0
1
1
0
0
1
1
0
‘1’
TABLE 6-2: SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register on
Page
ANSELB — — ANSB5 ANSB4 — — — — 56
INTCON
GIE PEIE TMR0IE INTE RABIE TMR0IF INTF RABIF 38
IOCB IOCB7 IOCB6 IOCB5 IOCB4 — — — — 56
OPTION_REG RABPU
INTEDG T0CS T0SE PSA PS2 PS1 PS0 21
PORTB RB7 RB6 RB5 RB4 — — — — 55
TRISB TRISB7 TRISB6 TRISB5 TRISB4
— — — — 55
WPUB WPUB7 WPUB6 WPUB5 WPUB4 — — — — 55
Legend: x = unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by
PORTB.