Microchip Technology PIC16F716, Datasheet

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PIC16F716
DS41206A-page 22
Preliminary

2003 Microchip Technology Inc.
FIGURE 3-4: BLOCK DIAGRAM OF RB1/T1OSO/T1CKI PIN
FIGURE 3-5: BLOCK DIAGRAM OF RB2/T1OSI PIN
Q D
Q CK
Q D
Q CK
TTL Buffer
TRIS Latch
Data Latch
RB1/T1OSO/T1CKI
DATA BUS
WR PORTB
WR TRISB
T1OSCEN
RD PORTB
T1OSI (From RB2)
To Timer1 clock input
P
V
DD
weak
pull-up
RBPU
(1)
T1OSCEN
V
SS
V
DD
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (OPTION_REG<7>).
RD TRISB
D Q
EN
TMR1 oscillator
ST Buffer
P
V
DD
weak
pull-up
Q D
Q
CK
Q D
Q CK
TTL Buffer
TRIS Latch
Data Latch
DATA BUS
WR PORTB
WR TRISB
T1OSCEN
RD PORTB
RB2/T1OSI
RBPU
(1)
T1OSCEN
V
SS
V
DD
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (OPTION_REG<7>).
RD TRIS
D Q
EN
T1OSO (To RB1)
TMR1
Oscillator