PIC16C745/P Microchip Technology, PIC16C745/P Datasheet - Page 37

• Manufacturer Part Number: PIC16C745/P
• Description: 8-Bit CMOS Microcontrollers with USB
• Manufacturer: Microchip Technology

5.4
PORTD is an 8-bit port with Schmitt Trigger input buff-
ers. Each pin is individually configured as an input or
output.
PORTD can be configured as an 8-bit wide micropro-
cessor port (parallel slave port) by setting control bit
PSPMODE (TRISE<4>). In this mode, the input buffers
are TTL.
TABLE 5-7:
TABLE 5-8:
Legend:
Address
08h
88h
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used by PORTD.
Note:
1999 Microchip Technology Inc.
Note 1:
Note 1:
PORTD and TRISD Registers
RD0/PSP0
RD1/PSP1
RD2/PSP2
RD3/PSP3
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7
PORTD
TRISD
The PIC16C745 does not provide PORTD.
The PORTD and TRISD registers are
reserved. Always maintain these bits clear.
OD = open drain, ST = Schmitt Trigger
PIC16C765 only.
PIC16C765 only.
Name
Name
(1)
(1)
PORTD FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTD
PORTD Data Direction Register
Bit 7
RD7
Function
Bit 6
RD6
PSP0
PSP1
PSP2
PSP3
PSP4
PSP5
PSP6
PSP7
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
Bit 5
RD5
Advanced Information
Input
Type
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
Bit 4
RD4
Output
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
Type
—
—
—
—
—
—
—
—
Bit 3
RD3
FIGURE 5-6:
WR
TRIS
Data
Bus
WR
PORT
RD PORT
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bi-directional I/O
Parallel Slave Port data input
Bit 2
RD2
TRIS Latch
Data Latch
D
D
Bit 1
RD1
CK
CK
RD TRIS
PIC16C745/765
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
PORTD BLOCK DIAGRAM
Q
Q
Bit 0
RD0
Description
Q
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
xxxx xxxx
1111 1111
EN
Value on:
Schmitt
Trigger
Input
Buffer
EN
POR,
BOR
D
DS41124A-page 37
other resets
Value on all
uuuu uuuu
1111 1111
V
DD
I/O pin