PIC14000-04 Microchip Technology, PIC14000-04 Datasheet - Page 32

• Manufacturer Part Number: PIC14000-04
• Description: 28-Pin Programmable Mixed Signal Controller
• Manufacturer: Microchip Technology

PIC14000
5.3
PORTD is an 8-bit port that may be used for general
purpose I/O. Four pins can be configured as analog
inputs.
FIGURE 5-8:
FIGURE 5-9:
DS40122B-page 32
PORTD and TRISD
1.
2.
I/O pins have protection diodes to VDD and VSS.
If CMBOE (CMCON<5>) is set to ‘1’, RD2 becomes CMPB,
RD3 becomes REFB, ignoring the PORTD<3:2> data and
TRISD<3:2> register settings.
BLOCK DIAGRAM OF PORTD<7:4> PINS
BLOCK DIAGRAM OF PORTD<3:2> PINS
PORTD
TRISD
Read
PortD
PORTD
Write
Write
Data
TRISD
Bus
Write
Write
Data
Bus
Note: I/O pins have protection diodes to V
To A/D Converter
D
CK Q
D
CK Q
Read
PORTD
TRISD
Read
D
Q
CK Q
D
Q
CK Q
TRISD
Read
Q
Q
Preliminary
Q
Analog Input Mode
Schmitt Trigger
Input Buffer
EN
D
Q
V
SS
EN
V
P
N
Schmitt Trigger
D
DD
Input Buffer
DD
I/O
Pin
and V
Read PORTD
SS
.
I/O
Pin
1996 Microchip Technology Inc.