ATA5773-DK1 Atmel, ATA5773-DK1 Datasheet - Page 61
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ATA5773-DK1
Manufacturer Part Number
ATA5773-DK1
Description
BOARD XMITTER FOR ATA5773 315MHZ
Manufacturer
Atmel
Type
Transmitterr
Specifications of ATA5773-DK1
Frequency
315MHz
Maximum Frequency
315 MHz
Supply Voltage (max)
4 V
Supply Voltage (min)
2 V
Supply Current
9 mA
Product
RF Development Tools
For Use With/related Products
ATA5773
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.14.2
9137E–RKE–12/10
Ports as General Digital I/O
Three I/O memory address locations are allocated for each port, one each for the Data Regis-
ter – PORTx, Data Direction Register – DDRx, and the Port Input Pins – PINx. The Port Input
Pins I/O location is read only, while the Data Register and the Data Direction Register are
read/write. However, writing a logic one to a bit in the PINx Register, will result in a toggle in
the corresponding bit in the Data Register. In addition, the Pull-up Disable – PUD bit in
MCUCR disables the pull-up function for all pins in all ports when set.
Using the I/O port as General Digital I/O is described in
tal I/O” on page
features on the device. How each alternate function interferes with the port pin is described in
Section 4.14.3 “Alternate Port Functions” on page
for a full description of the alternate functions.
Note that enabling the alternate function of some of the port pins does not affect the use of the
other pins in the port as general digital I/O.
The ports are bi-directional I/O ports with optional internal pull-ups.
tional description of one I/O-port pin, here generically called Pxn.
Figure 4-22. General Digital I/O
Note:
Pxn
1. WRx, WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port. clk
SLEEP, and PUD are common to all ports.
61. Most port pins are multiplexed with alternate functions for the peripheral
PUD:
SLEEP:
clk
I/O
:
PULLUP DISABLE
SLEEP CONTROL
I/O CLOCK
SLEEP
(1)
SYNCHRONIZER
D
L
Q
Q
D
PINxn
Q
Q
66. Refer to the individual module sections
Atmel ATA5771/73/74
RESET
RESET
PORTxn
WDx:
RDx:
WRx:
RRx:
RPx:
WPx:
Q
Q
Q
Q
DDxn
Section 4.14.2 “Ports as General Digi-
CLR
CLR
D
D
RRx
WRITE DDRx
READ DDRx
WRITE PORTx
READ PORTx REGISTER
READ PORTx PIN
WRITE PINx REGISTER
PUD
WDx
RDx
RPx
clk
Figure 4-22
1
0
I/O
WRx
WPx
shows a func-
I/O
,
61
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