PIC16LF720_11 Datasheet, PDF (61/244 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC16(L)F720/721
FIGURE 6-10:
BLOCK DIAGRAM OF RB7
Data Bus
DQ
WR
WPUB
CK _Q
RD
WPUB
DQ
WR
PORTB
CK _Q
WR
TRISB
DQ
CK _Q
RD
TRISB
RABPU
SPEN
TXEN
SYNC
AUSART
CK ₀₁
AUSART
TX
10
01
10
‘1’ 01
10
VDD
Weak
VDD
I/O Pin
VSS
RD
PORTB
DQ
WR
IOCB
CK _Q
RD
IOCB
Interrupt-on-
Change
QD
EN
Q3
QD
EN
RD PORTB
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
Value on
POR, BOR
Value on all
other
Resets
ADCON0
—
—
CHS3
CHS2
CHS1
CHS0 GO/DONE ADON --00 0000 --00 0000
ANSELB
INTCON
IOCB
—
GIE
IOCB7
—
PEIE
IOCB6
ANSB5
TMR0IE
IOCB5
ANSB4
INTE
IOCB4
—
RABIE
—
—
TMR0IF
—
—
INTF
—
—
RABIF
—
--11 ---- --11 ----
0000 000x 0000 000x
0000 ---- 0000 ----
OPTION_REG RABPU INTEDG T0CS
T0SE
PSA
PS2
PS1
PS0 1111 1111 1111 1111
PORTB
RB7
RB6
RB5
RB4
—
—
—
—
xxxx ---- uuuu ----
T1GCON
TMR1GE T1GPOL
T1GTM
T1GSPM T1GGO/
DONE
T1GVAL
T1GSS1 T1GSS0 0000 0x00 uuuu uxuu
TRISB
TRISB7 TRISB6 TRISB5 TRISB4
—
—
—
—
1111 ---- 1111 ----
WPUB
WPUB7 WPUB6 WPUB5 WPUB4
—
—
—
—
1111 ---- 1111 ----
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D 0000 000x 0000 000x
TXREG
AUSART Transmit Data Register
0000 0000 0000 0000
RCREG
AUSART Receive Data Register
0000 0000 0000 0000
Legend: x = unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by PORTB.
 2011 Microchip Technology Inc.
Preliminary
DS41430B-page 61