PIC16F62X
FIGURE 5-9: BLOCK DIAGRAM OF RB1/TX/DT PIN
VDD
weak pull-up
RBPU
P
PORT/PERIPHERAL Select(1)
USART data output
0
VDD
P
1
Data Bus
D
Q
Q
VDD
WR PORTB
WR TRISB
CK
Data Latch
RB1/RX/DT
pin
D
Q
Q
N
CK
VSS
TRIS Latch
VSS
RD TRISB
TTL
input
buffer
Peripheral OE(2)
Q
D
RD PORTB
EN
USART receive input
RD PORTB
Schmitt
Trigger
Note 1: Port/Peripheral select signal selects between port data and peripheral output.
Note 2: Peripheral OE( output enable) is only active if peripheral select is active.
DS40300B-page 36
Preliminary
1999 Microchip Technology Inc.