ATMEGA324P-A15MZ Atmel, ATMEGA324P-A15MZ Datasheet - Page 272

• Manufacturer Part Number: ATMEGA324P-A15MZ
• Description: MCU AVR 32KB FLASH 15MHZ 44-VQFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA324P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 1K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Program Memory Size: 32KB (32K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Data Polling EEPROM
272
ATmega32(L)
ten. 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 $FF, so when programming
this value, the user will have to wait for at least t
a chip erased device contains $FF in all locations, programming of addresses that are meant to
contain $FF, can be skipped. See
When a new byte has been written and is being programmed into EEPROM, reading the
address location being programmed will give the value $FF. At the time the device is ready for a
new byte, the programmed value will read correctly. This is used to determine when the next
byte can be written. This will not work for the value $FF, but the user should have the following in
mind: As a chip erased device contains $FF in all locations, programming of addresses that are
meant to contain $FF, 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 $FF, and
the user will have to wait at least t
for t
Table 114. Minimum Wait Delay before Writing the Next Flash or EEPROM Location
Figure 137. SPI Serial Programming Waveforms
Symbol
t
t
t
t
WD_FLASH
WD_EEPROM
WD_ERASE
WD_FUSE
WD_EEPROM
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
value.
SAMPLE
(MOSI)
(MISO)
(SCK)
MSB
MSB
Minimum Wait Delay
4.5 ms
9.0 ms
9.0 ms
4.5 ms
Table 114
WD_EEPROM
for t
before programming the next byte. See
WD_FLASH
WD_FLASH
before programming the next page. As
value
LSB
LSB
2503N–AVR–06/08
Table 114