ATMEGA169-16AI SL709 Atmel, ATMEGA169-16AI SL709 Datasheet - Page 56
ATMEGA169-16AI SL709
Manufacturer Part Number
ATMEGA169-16AI SL709
Description
IC AVR MCU 16K 16MHZ IND 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169-16AI SL709
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA16916ASL709
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Ports as General Digital
I/O
Configuring the Pin
56
ATmega169/V
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. Figure 23 shows a
functional description of one I/O-port pin, here generically called Pxn.
Figure 23. General Digital I/O
Note:
Each port pin consists of three register bits: DDxn, PORTxn, and PINxn. As shown in
“Register Description for I/O-Ports” on page 76, the DDxn bits are accessed at the
DDRx I/O address, the PORTxn bits at the PORTx I/O address, and the PINxn bits at
the PINx I/O address.
The DDxn bit in the DDRx Register selects the direction of this pin. If DDxn is written
logic one, Pxn is configured as an output pin. If DDxn is written logic zero, Pxn is config-
ured as an input pin.
If PORTxn is written logic one when the pin is configured as an input pin, the pull-up
resistor is activated. To switch the pull-up resistor off, PORTxn has to be written logic
zero or the pin has to be configured as an output pin. The port pins are tri-stated when
reset condition becomes active, even if no clocks are running.
If PORTxn is written logic one when the pin is configured as an output pin, the port pin is
driven high (one). If PORTxn is written logic zero when the pin is configured as an out-
put pin, the port pin is driven low (zero).
Pxn
1. WRx, WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port.
clk
I/O
PUD:
SLEEP:
clk
I/O
, SLEEP, and PUD are common to all ports.
:
PULLUP DISABLE
SLEEP CONTROL
I/O CLOCK
(1)
SLEEP
SYNCHRONIZER
D
L
WDx:
RDx:
WRx:
RRx:
RPx:
WPx:
Q
Q
D
PINxn
WRITE DDRx
READ DDRx
WRITE PORTx
READ PORTx REGISTER
READ PORTx PIN
WRITE PINx REGISTER
Q
Q
RESET
RESET
PORTxn
Q
Q
Q
Q
DDxn
CLR
CLR
D
D
RRx
PUD
clk
WDx
RDx
RPx
1
0
I/O
2514P–AVR–07/06
WPx
WRx
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