ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 359

• Manufacturer Part Number: ATXMEGA256A3B-MH
• Description: MCU AVR 256KB FLASH A3B 64-QFN
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA256A3B-MH

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 256KB (128K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 16x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Processor Series: ATXMEGA256x
• Core: AVR8
• Data Bus Width: 8 bit, 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 49
• Number Of Timers: 7
• Operating Supply Voltage: 1.6 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 12 bit, 2 Channel
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATXMEGA256A3B-MU; ATXMEGA256A3B-MU

29.7
29.7.1
29.7.2
29.7.3
8077H–AVR–12/09
Register Description - PDI Control and Status Register
STATUS - Program and Debug Interface Status Register
RESET - Program and Debug Interface Reset register
CTRL - Program and Debug Interface Control Register
These register are registers that are accessible in the PDI Control and Status Register Space
(CSRS) using the instructions LDCS and STCS. The CSRS is allocated for registers directly
involved in configuration and status monitoring of the PDI itself.
• Bit 7:2 - Reserved Bits
These bits are reserved and will always be read as zero. For compatibility with future devices,
always write these bits to zero when this register is written.
• Bit 1- NVMEN: Non-Volatile Memory Enable
This status bit is set when the key signalling enables the NVM programming interface. The
External Programmer can poll this bit to verify successful enabling. Writing the NVMEN bit dis-
ables the NVM interface
• Bit 0 - Reserved Bit
This bit is reserved and will always be read as zero. For compatibility with future devices, always
write this bit to zero when this register is written.
• Bit 7:0 - RESET[7:0]: Reset Signature
When the Reset Signature - 0x59 - is written to RESET, the device is forced into reset. The
device is kept in reset until RESET is written with a data value different from the Reset Signature
(0x00 is recommended). Reading the least LSB bit the will return the status of the RESET. The 7
MSB bits will always return the value 0x00 regardless of whether the device is in reset or not.
• Bit 7:3 - Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
Bit
+0x01
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
Bit
+0x02
Read/Write
Initial Value
R/W
R
R
7
0
7
0
7
0
-
-
R/W
R
R
6
0
6
0
6
0
-
-
R/W
R
R
5
0
5
0
5
0
-
-
R/W
R
R
4
0
4
0
4
0
-
-
RESET[7:0]
R/W
R
R
3
0
3
0
3
0
-
-
R/W
R/W
R
2
0
2
0
2
0
-
GUARDTIME[2:0]
NVMEN
R/W
R/W
R
1
0
1
0
1
0
XMEGA A
R/W
R/W
R
0
0
0
0
0
0
-
STATUS
CTRLB
CTRL
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