ATMEGA8515L-8JJ Atmel, ATMEGA8515L-8JJ Datasheet - Page 27
![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: 27 of 257
- Download datasheet (2Mb)
Pull-up and Bus Keeper
Timing
2512K–AVR–01/10
The pull-up resistors on the AD7:0 ports may be activated if the corresponding Port
Register is written to one. To reduce power consumption in sleep mode, it is recom-
mended to disable the pull-ups by writing the Port Register to zero before entering
sleep.
The XMEM interface also provides a bus keeper on the AD7:0 lines. The bus keeper
can be disabled and enabled in software as described in “Special Function IO Register –
SFIOR” on page 31. When enabled, the bus keeper will keep the previous value on the
AD7:0 bus while these lines are tri-stated by the XMEM interface.
External memory devices have various timing requirements. To meet these require-
ments, the ATmega8515 XMEM interface provides four different wait states as shown in
Table 3. It is important to consider the timing specification of the external memory
device before selecting the wait state. The most important parameters are the access
time for the external memory in conjunction with the set-up requirement of the
ATmega8515. The access time for the external memory is defined to be the time from
receiving the chip select/address until the data of this address actually is driven on the
bus. The access time cannot exceed the time from the ALE pulse is asserted low until
data must be stable during a read sequence (t
105 on page 204). The different wait states are set up in software. As an additional fea-
ture, it is possible to divide the external memory space in two sectors with individual wait
state settings. This makes it possible to connect two different memory devices with dif-
ferent timing requirements to the same XMEM interface. For XMEM interface timing
details, please refer to Figure 89 to Figure 92, and Table 98 to Table 105.
Note that the XMEM interface is asynchronous and that the waveforms in the figures
below are related to the internal system clock. The skew between the Internal and Exter-
nal clock (XTAL1) is not guaranteed (it varies between devices, temperature, and supply
voltage). Consequently, the XMEM interface is not suited for synchronous operation.
Figure 13. External Data Memory Cycles without Wait State (SRWn1 = 0 and
SRWn0 = 0)
Note:
System Clock (CLK
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 1)
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper
sector) or SRW00 (lower sector)
The ALE pulse in period T4 is only present if the next instruction accesses the RAM
(internal or external).
(1)
DA7:0
A15:8
CPU
ALE
WR
RD
)
Prev. Addr.
Prev. Data
Prev. Data
Prev. Data
T1
Address
Address
Address
T2
XX
LLRL
+ t
RLRH
Address
T3
ATmega8515(L)
Data
Data
Data
- t
DVRH
in Table 98 to Table
T4
27
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: