ATMEGA8515-16AC Atmel, ATMEGA8515-16AC Datasheet - Page 64
ATMEGA8515-16AC
Manufacturer Part Number
ATMEGA8515-16AC
Description
IC AVR MCU 8K 16MHZ COM 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8515-16AC
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
35
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
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Price
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Unconnected pins
Alternate Port Functions
64
ATmega8515(L)
If some pins are unused, it is recommended to ensure that these pins have a defined
level. Even though most of the digital inputs are disabled in the deep sleep modes as
described above, floating inputs should be avoided to reduce current consumption in all
other modes where the digital inputs are enabled (Reset, Active mode and Idle mode).
The simplest method to ensure a defined level of an unused pin, is to enable the internal
pull-up. In this case, the pull-up will be disabled during reset. If low power consumption
during reset is important, it is recommended to use an external pull-up or pull-down.
Connecting unused pins directly to V
cause excessive currents if the pin is accidentally configured as an output.
Most port pins have alternate functions in addition to being general digital I/Os. Figure
33 shows how the port pin control signals from the simplified Figure 30 can be overrid-
den 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 micro-
controller family.
Figure 33. Alternate Port Functions
Note:
DIEOExn: Pxn DIGITAL INPUT-ENABLE OVERRIDE ENABLE
DIEOVxn: Pxn DIGITAL INPUT-ENABLE OVERRIDE VALUE
SLEEP:
PUOExn:
PUOVxn:
DDOExn:
DDOVxn:
PVOExn:
PVOVxn:
1. WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port. clk
Pxn
SLEEP, and PUD are common to all ports. All other signals are unique for each pin.
Pxn PULL-UP OVERRIDE ENABLE
Pxn PULL-UP OVERRIDE VALUE
Pxn DATA DIRECTION OVERRIDE ENABLE
Pxn DATA DIRECTION OVERRIDE VALUE
Pxn PORT VALUE OVERRIDE ENABLE
Pxn PORT VALUE OVERRIDE VALUE
SLEEP CONTROL
1
0
1
0
1
0
1
0
(1)
CC
PUOExn
PUOVxn
DDOExn
DDOVxn
PVOExn
PVOVxn
DIEOExn
DIEOVxn
SLEEP
or GND is not recommended, since this may
PUD:
WDx:
RDx:
RRx:
WPx:
RPx:
clk
DIxn:
AIOxn:
SYNCHRONIZER
D
L
I/O
SET
CLR
:
Q
Q
PULLUP DISABLE
WRITE DDRx
READ DDRx
READ PORTx REGISTER
WRITE PORTx
READ PORTx PIN
I/O CLOCK
DIGITAL INPUT PIN n ON PORTx
ANALOG INPUT/OUTPUT PIN n ON PORTx
D
PINxn
CLR
Q
Q
RESET
RESET
PORTxn
Q
Q
Q
Q
DDxn
CLR
CLR
D
D
clk
PUD
WDx
WPx
RRx
DIxn
AIOxn
RDx
RPx
I/O
2512K–AVR–01/10
I/O
,
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