PIC14000T-04/SS View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'PIC14000T-04/SS' PDF : 153 Pages View PDF
PIC14000
5.3 PORTD and TRISD
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: BLOCK DIAGRAM OF PORTD<7:4> PINS
Data
Bus
Write
PORTD
DQ
CK Q
VDD
P
I/O
Pin
Write
TRISD
DQ
CK Q
Read
TRISD
N
VSS
Analog Input Mode
Schmitt Trigger
Input Buffer
Read
PortD
QD
EN
To A/D Converter
Note: I/O pins have protection diodes to VDD and VSS.
FIGURE 5-9: BLOCK DIAGRAM OF PORTD<3:2> PINS
Data
Bus
DQ
Write
PORTD
CK Q
I/O
Pin
Write
TRISD
DQ
CK Q
Read
TRISD
Read
PORTD
Schmitt Trigger
Input Buffer
QD
EN
Read PORTD
1. I/O pins have protection diodes to VDD and VSS.
2. 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.
DS40122B-page 32
Preliminary
© 1996 Microchip Technology Inc.
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