ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 310

• Manufacturer Part Number: ATMEGA644P-A15MZ
• Description: MCU AVR 64KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-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: 2K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Program Memory Size: 64KB (64K 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

310
ATmega164P/324P/644P
Figure 25-7. Parallel Programming Timing, Including some General Timing Requirements
Figure 25-8. Parallel Programming Timing, Loading Sequence with Timing Requirements
Note:
Figure 25-9. Parallel Programming Timing, Reading Sequence (within the Same Page) with
Note:
(DATA, XA0/1, BS1, BS2)
1. The timing requirements shown in
1. The timing requirements shown in
XTAL1
DATA
PAGEL
XTAL1
BS1
XA0
XA1
DATA
OE
apply to loading operation.
apply to reading operation.
BS1
XA0
XA1
Data & Contol
Timing Requirements
RDY/BSY
PAGEL
XTAL1
ADDR0 (Low Byte)
LOAD ADDRESS
ADDR0 (Low Byte)
WR
LOAD ADDRESS
(LOW BYTE)
(LOW BYTE)
t
XLOL
t
OLDV
t
t
BVPH
DVXH
(1)
(LOW BYTE)
LOAD DATA
DATA (Low Byte)
t
t
XHXL
PHPL
DATA (Low Byte)
Figure 25-7 on page 310
READ DATA
(LOW BYTE)
Table 25-7 on page 310
t
t
t
t
t
XLXH
XLDX
PLBX
XLWL
PLWL
t
BVDV
t
(HIGH BYTE)
LOAD DATA
BVWL
DATA (High Byte)
(HIGH BYTE)
READ DATA
DATA (High Byte)
t
XLPH
t
LOAD DATA
WLWH
WLRL
(i.e., t
(i.e., t
t
OHDZ
t
PLXH
DVXH
DVXH
t
WLBX
LOAD ADDRESS
LOAD ADDRESS
, t
(LOW BYTE)
(LOW BYTE)
, t
ADDR1 (Low Byte)
XHXL
ADDR1 (Low Byte)
XHXL
, and t
, and t
7674F–AVR–09/09
t
WLRH
XLDX
XLDX
) also
) also
(1)