ATmega8515 Atmel Corporation, ATmega8515 Datasheet - Page 65

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ATmega8515

Manufacturer Part Number
ATmega8515
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega8515

Flash (kbytes)
8 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
35
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
3
Input Capture Channels
1
Pwm Channels
3
32khz Rtc
No
Calibrated Rc Oscillator
Yes

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2512K–AVR–01/10
Table 25 summarizes the function of the overriding signals. The pin and port indexes
from Figure 33 are not shown in the succeeding tables. The overriding signals are gen-
erated internally in the modules having the alternate function.
Table 25. Generic Description of Overriding Signals for Alternate Functions.
The following subsections shortly describe the alternate functions for each port, and
relate the overriding signals to the alternate function. Refer to the alternate function
description for further details.
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Full Name
Pull-up Override
Enable
Pull-up Override
Value
Data Direction
Override Enable
Data Direction
Override Value
Port Value
Override Enable
Port Value
Override Value
Digital Input
Enable Override
Enable
Digital Input
Enable Override
Value
Digital Input
Analog
Input/output
Description
If this signal is set, the pull-up enable is controlled by the
PUOV signal. If this signal is cleared, the pull-up is
enabled when {DDxn, PORTxn, PUD} = 0b010.
If PUOE is set, the pull-up is enabled/disabled when
PUOV is set/cleared, regardless of the setting of the
DDxn, PORTxn, and PUD Register bits.
If this signal is set, the Output Driver Enable is controlled
by the DDOV signal. If this signal is cleared, the Output
driver is enabled by the DDxn Register bit.
If DDOE is set, the Output Driver is enabled/disabled
when DDOV is set/cleared, regardless of the setting of the
DDxn Register bit.
If this signal is set and the Output Driver is enabled, the
port value is controlled by the PVOV signal. If PVOE is
cleared, and the Output Driver is enabled, the port Value is
controlled by the PORTxn Register bit.
If PVOE is set, the port value is set to PVOV, regardless of
the setting of the PORTxn Register bit.
If this bit is set, the Digital Input Enable is controlled by the
DIEOV signal. If this signal is cleared, the Digital Input
Enable is determined by MCU-state (Normal mode, sleep
modes).
If DIEOE is set, the Digital Input is enabled/disabled when
DIEOV is set/cleared, regardless of the MCU state
(Normal mode, sleep modes).
the signal is connected to the output of the schmitt trigger
but before the synchronizer. Unless the Digital Input is
used as a clock source, the module with the alternate
function will use its own synchronizer.
This is the Analog Input/Output to/from alternate functions.
The signal is connected directly to the pad, and can be
used bi-directionally.
This is the Digital Input to alternate functions. In the figure,
ATmega8515(L)
65

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