ATMEGA324PA-MUR Atmel, ATMEGA324PA-MUR Datasheet - Page 21

• Manufacturer Part Number: ATMEGA324PA-MUR
• Description: MCU AVR 32KB FLASH 20 MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA324PA-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.3.1
8152G–AVR–11/09
Data Memory Access Times
The 32 general purpose working registers, 64 I/O registers, 160 Extended I/O Registers and the
1024/2048/4096 bytes of internal data SRAM in the ATmega164PA/324PA/644PA/1284P are all
accessible through all these addressing modes. The Register File is described in
pose Register File” on page
Figure 7-2.
This section describes the general access timing concepts for internal memory access. The
internal data SRAM access is performed in two clk
Figure 7-3.
Address
clk
Data Memory Map for ATmega164PA/324PA/644PA/1284P
On-chip Data SRAM Access Cycles
Data
Data
WR
CPU
(1024/2048/4096/16384x 8)
RD
160 Ext I/O Reg.
64 I/O Registers
Data Memory
Internal SRAM
32 Registers
ATmega164PA/324PA/644PA/1284P
Compute Address
13.
T1
Memory Access Instruction
0x0000 - 0x001F
0x0100
0x04FF/0x08FF/0x10FF /0x40FF
0x0020 - 0x005F
0x0060 - 0x00FF
Address valid
CPU
T2
cycles as described in
Next Instruction
T3
Figure
”General Pur-
7-3.
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