ATMEGA8515L-8JJ Atmel, ATMEGA8515L-8JJ Datasheet - Page 107
![IC MCU AVR 8K 5V 8MHZ 44-PLCC](/photos/6/70/67043/453-44-plcc_sml.jpg)
ATMEGA8515L-8JJ
Manufacturer Part Number
ATMEGA8515L-8JJ
Description
IC MCU AVR 8K 5V 8MHZ 44-PLCC
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8515L-8JJ
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
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)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 107 of 257
- Download datasheet (2Mb)
Force Output Compare
Compare Match Blocking by
TCNT1 Write
Using the Output Compare
Unit
2512K–AVR–01/10
sequence. The synchronization prevents the occurrence of odd-length, non-symmetrical
PWM pulses, thereby making the output glitch-free.
The OCR1x Register access may seem complex, but this is not case. When the double
buffering is enabled, the CPU has access to the OCR1x Buffer Register, and if double
buffering is disabled the CPU will access the OCR1x directly. The content of the OCR1x
(Buffer or Compare) Register is only changed by a write operation (the Timer/Counter
does not update this register automatically as the TCNT1 – and ICR1 Register). There-
fore OCR1x is not read via the high byte temporary register (TEMP). However, it is a
good practice to read the low byte first as when accessing other 16-bit registers. Writing
the OCR1x Registers must be done via the TEMP Register since the compare of all 16
bits is done continuously. The high byte (OCR1xH) has to be written first. When the high
byte I/O location is written by the CPU, the TEMP Register will be updated by the value
written. Then when the low byte (OCR1xL) is written to the lower eight bits, the high byte
will be copied into the upper eight bits of either the OCR1x Buffer or OCR1x Compare
Register in the same system clock cycle.
For more information of how to access the 16-bit registers refer to “Accessing 16-bit
Registers” on page 100.
In non-PWM Waveform Generation modes, the match output of the comparator can be
forced by writing a one to the Force Output Compare (FOC1x) bit. Forcing Compare
Match will not set the OCF1x Flag or reload/clear the timer, but the OC1x pin will be
updated as if a real Compare Match had occurred (the COM11:0 bits settings define
whether the OC1x pin is set, cleared or toggled).
All CPU writes to the TCNT1 Register will block any Compare Match that occurs in the
next timer clock cycle, even when the timer is stopped. This feature allows OCR1x to be
initialized to the same value as TCNT1 without triggering an interrupt when the
Timer/Counter clock is enabled.
Since writing TCNT1 in any mode of operation will block all Compare Matches for one
timer clock cycle, there are risks involved when changing TCNT1 when using any of the
output compare channels, independent of whether the Timer/Counter is running or not.
If the value written to TCNT1 equals the OCR1x value, the Compare Match will be
missed, resulting in incorrect waveform generation. Do not write the TCNT1 equal to
TOP in PWM modes with variable TOP values. The Compare Match for the TOP will be
ignored and the counter will continue to 0xFFFF. Similarly, do not write the TCNT1 value
equal to BOTTOM when the counter is downcounting.
The setup of the OC1x should be performed before setting the Data Direction Register
for the port pin to output. The easiest way of setting the OC1x value is to use the Force
Output Compare (FOC1x) strobe bits in Normal mode. The OC1x Register keeps its
value even when changing between Waveform Generation modes.
Be aware that the COM1x1:0 bits are not double buffered together with the compare
value. Changing the COM1x1:0 bits will take effect immediately.
ATmega8515(L)
107
Related parts for ATMEGA8515L-8JJ
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATMEGA128RFA1-ZU](/photos/12/13/121326/313-64-qfn_tmb.jpg)
Part Number:
Description:
IC AVR MCU 2.4GHZ XCEIVER 64QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA328P-20PU](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel
Datasheet:
![ATMEGA64RZAV-10PU](/photos/14/18/141872/atmega64rzav-10pu_tmb.jpg)
Part Number:
Description:
MCU ATMEGA644/AT86RF230 40-DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA64RZAPV-10MU](/photos/12/13/121326/313-64-qfn_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA644P/AT86RF230 QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA64RZAPV-10AU](/photos/6/70/67042/313-44-tqfp_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA644P/AT86RF230 TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA128RZAV-8AU](/photos/12/13/121332/313-64-tqfp_tmb.jpg)
Part Number:
Description:
MCU ATMEGA1281/AT86RF230 64-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA128RZBV-8AU](/photos/6/70/67048/313-100-tqfp_tmb.jpg)
Part Number:
Description:
MCU ATMEGA1280/AT86RF230 100TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA128RZBV-8CU](/photos/6/70/67048/313-100-tqfp_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA1280/AT86RF100-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA256RZBV-8CU](/photos/6/89/68968/313-100-cbga_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA2560V/AT86RF230-ZU
Manufacturer:
Atmel
Datasheet:
![ATMEGA256RZAV-8AU](/photos/12/13/121332/313-64-tqfp_tmb.jpg)
Part Number:
Description:
MCU ATMEGA2561/AT86RF230 64-TQFP
Manufacturer:
Atmel
Datasheet:
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet: