ATmega1284P datasheet(76/380 Pages) ATMEL

76 / 380 page

8059D–AVR–11/09

ATmega1284P

12.3

Alternate Port Functions

Most port pins have alternate functions in addition to being general digital I/Os. Figure 12-5

shows how the port pin control signals from the simplified Figure 12-2 on page 71 can be over-

ridden by alternate functions. The overriding signals may not be present in all port pins, but the

figure serves as a generic description applicable to all port pins in the AVR microcontroller

family.

Figure 12-5. Alternate Port Functions

(1)

Note:

1. WRx, WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port. clkI/O,

SLEEP, and PUD are common to all ports. All other signals are unique for each pin.

clk

RPx

RRx

WRx

RDx

WDx

PUD

SYNCHRONIZER

WDx:

WRITE DDRx

WRx:

WRITE PORTx

RRx:

READ PORTx REGISTER

RPx:

READ PORTx PIN

PUD:

PULLUP DISABLE

clk

I/O:

I/O CLOCK

RDx:

READ DDRx

SET

CLR

DIxn

AIOxn

DIEOExn

PVOVxn

PVOExn

DDOVxn

DDOExn

PUOExn

PUOVxn

PUOExn:

Pxn PULL-UP OVERRIDE ENABLE

PUOVxn:

Pxn PULL-UP OVERRIDE VALUE

DDOExn:

Pxn DATA DIRECTION OVERRIDE ENABLE

DDOVxn:

Pxn DATA DIRECTION OVERRIDE VALUE

PVOExn:

Pxn PORT VALUE OVERRIDE ENABLE

PVOVxn:

Pxn PORT VALUE OVERRIDE VALUE

DIxn:

DIGITAL INPUT PIN n ON PORTx

AIOxn:

ANALOG INPUT/OUTPUT PIN n ON PORTx

RESET

CLR

PINxn

PORTxn

DDxn

DIEOVxn

SLEEP

DIEOExn:

Pxn DIGITAL INPUT-ENABLE OVERRIDE ENABLE

DIEOVxn:

Pxn DIGITAL INPUT-ENABLE OVERRIDE VALUE

SLEEP:

SLEEP CONTROL

Pxn

I/O

PTOExn

PTOExn:

Pxn, PORT TOGGLE OVERRIDE ENABLE

WPx:

WRITE PINx

WPx

ATmega1284P датащи(PDF) 76 Page - ATMEL Corporation

ATmega1284P датащи(HTML) 76 Page - ATMEL Corporation

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

датащи скачать

ссылки URL