ATMEGA2561R231-MU Atmel, ATMEGA2561R231-MU Datasheet - Page 34
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ATMEGA2561R231-MU
Manufacturer Part Number
ATMEGA2561R231-MU
Description
BUNDLE ATMEGA2561/RF231 QFN
Manufacturer
Atmel
Datasheet
1.ATMEGA640V-8CU.pdf
(444 pages)
Specifications of ATMEGA2561R231-MU
Frequency
2.4GHz
Modulation Or Protocol
802.15.4 Zigbee, 6LoWPAN, RF4CE, SP100, WirelessHART™, ISM
Data Interface
PCB, Surface Mount
Memory Size
256kB Flash, 4kB EEPROM, 8kB RAM
Antenna Connector
PCB, Surface Mount
Package / Case
64-QFN, 32-QFN
Processor Series
ATMEGA256x
Core
AVR8
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
256 KB
Data Ram Size
8 KB
Development Tools By Supplier
ATAVRRZ541, ATAVRRAVEN, ATAVRRZUSBSTICK, ATAVRISP2, ATAVRRZ201
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Power - Output
-
Operating Temperature
-
Applications
-
Sensitivity
-
Data Rate - Maximum
-
Current - Transmitting
-
Current - Receiving
-
Lead Free Status / Rohs Status
Details
- Current page: 34 of 444
- Download datasheet (10Mb)
2549M–AVR–09/10
Note:
Assembly Code Example
C Code Example
#define OFFSET 0x4000
void XRAM_example(void)
{
}
; OFFSET is defined to 0x4000 to ensure
; external memory access
; Configure Port C (address high byte) to
; output 0x00 when the pins are released
; for normal Port Pin operation
ldi
out
ldi
out
; release PC7:6
ldi
sts
; write 0xAA to address 0x0001 of external
; memory
ldi
sts
; re-enable PC7:6 for external memory
ldi
sts
; store 0x55 to address (OFFSET + 1) of
; external memory
ldi
sts
unsigned char *p = (unsigned char *) (OFFSET + 1);
DDRC = 0xFF;
PORTC = 0x00;
XMCRB = (1<<XMM1);
*p = 0xaa;
XMCRB = 0x00;
*p = 0x55;
1. See “About Code Examples” on page 11.
r16, 0xFF
DDRC, r16
r16, 0x00
PORTC, r16
r16, (1<<XMM1)
XMCRB, r16
r16, 0xaa
0x0001+OFFSET, r16
r16, (0<<XMM1)
XMCRB, r16
r16, 0x55
0x0001+OFFSET, r16
(1)
(1)
ATmega640/1280/1281/2560/2561
34
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