PIC18F6410ESLASHPTSQTP datasheet(128/404 Pages) MICROCHIP

128 / 404 page

PIC18F6310/6410/8310/8410

DS39635A-page 126

Preliminary

 2004 Microchip Technology Inc.

10.4

PORTD, TRISD and

LATD Registers

PORTD is an 8-bit wide, bidirectional port. The corre-

sponding data direction register is TRISD. Setting a

TRISD bit (= 1) will make the corresponding PORTD

pin an input (i.e., put the corresponding output driver in

a high-impedance mode). Clearing a TRISD bit (= 0)

will make the corresponding PORTD pin an output (i.e.,

put the contents of the output latch on the selected pin).

The Data Latch register (LATD) is also memory

mapped. Read-modify-write operations on the LATD

PORTD.

All pins on PORTD are implemented with Schmitt

Trigger

input

buffers.

Each

individually

configurable as an input or output.

In 80-pin devices, PORTD is multiplexed with the

system bus as part of the external memory interface.

I/O port and other functions are only available when the

interface is disabled by setting the EBDIS bit

(MEMCON<7>). When the interface is enabled,

PORTD is the low-order byte of the multiplexed

address/data bus (AD7:AD0). The TRISD bits are also

overridden.

PORTD can also be configured to function as an 8-bit

wide parallel microprocessor port by setting the

PSPMODE control bit (PSPCON<4>). In this mode,

parallel port data takes priority over other digital I/O (but

not the external memory interface). When the parallel

port is active, the input buffers are TTL. For more

information, refer to Section 10.10 “Parallel Slave

Port”.

EXAMPLE 10-4:

INITIALIZING PORTD

Note:

On a Power-on Reset, these pins are

configured as digital inputs.

CLRF

PORTD

; Initialize PORTD by

; clearing output

; data latches

CLRF

LATD

; Alternate method

; to clear output

; data latches

MOVLW

0CFh

; Value used to

; initialize data

; direction

MOVWF

TRISD

; Set RD<3:0> as inputs

; RD<5:4> as outputs

; RD<7:6> as inputs

PIC18F6410E/PTSQTP Datasheet(PDF) 128 Page - Microchip Technology

PIC18F6410E/PTSQTP Datasheet(HTML) 128 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL