ATMEGA162L-8MI Atmel, ATMEGA162L-8MI Datasheet - Page 244

• Manufacturer Part Number: ATMEGA162L-8MI
• Description: IC MCU AVR 16K 3V 8MHZ 44-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA162L-8MI

• 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: 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
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-VQFN Exposed Pad
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Data Polling Flash
Data Polling EEPROM
244
ATmega162(V/U/L)
6. Any memory location can be verified by using the Read instruction which returns
7. At the end of the programming session, RESET can be set high to commence
8. Power-off sequence (if needed):
When a page is being programmed into the Flash, reading an address location within
the page being programmed will give the value 0xFF. At the time the device is ready for
a new page, the programmed value will read correctly. This is used to determine when
the next page can be written. Note that the entire page is written simultaneously and any
address within the page can be used for polling. Data polling of the Flash will not work
for the value 0xFF, so when programming this value, the user will have to wait for at
least t
0xFF in all locations, programming of addresses that are meant to contain 0xFF, can be
skipped. See Table 110 for t
When a new byte has been written and is being programmed into EEPROM, reading the
address location being programmed will give the value 0xFF. At the time the device is
ready for a new byte, the programmed value will read correctly. This is used to deter-
mine when the next byte can be written. This will not work for the value 0xFF, but the
user should have the following in mind: As a chip erased device contains 0xFF in all
locations, programming of addresses that are meant to contain 0xFF, can be skipped.
This does not apply if the EEPROM is re-programmed without chip erasing the device.
In this case, data polling cannot be used for the value 0xFF, and the user will have to
wait at least t
t
Table 110. Minimum Wait Delay before Writing the Next Flash or EEPROM Location
Figure 106. SPI Serial Programming Waveforms
WD_EEPROM
Symbol
t
t
t
WD_FLASH
WD_EEPROM
WD_ERASE
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
the content at the selected address at serial output MISO.
normal operation.
Set RESET to “1”.
Turn V
WD_FLASH
CC
value.
SAMPLE
power off.
(MOSI)
(MISO)
(SCK)
WD_EEPROM
before programming the next page. As a chip erased device contains
MSB
MSB
before programming the next byte. See Table 110 for
WD_FLASH
Minimum Wait Delay
4.5 ms
9.0 ms
9.0 ms
value.
2513C–AVR–09/02
LSB
LSB