ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 16
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ATxmega64A1
Manufacturer Part Number
ATxmega64A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A1
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
78
Ext Interrupts
78
Usb Speed
No
Usb Interface
No
Spi
12
Twi (i2c)
4
Uart
8
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
4
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.6 to 3.6
Operating Voltage (vcc)
1.6 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
8
Output Compare Channels
24
Input Capture Channels
24
Pwm Channels
24
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A1-AU
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
ATxmega64A1U-AU
Manufacturer:
ATMEL
Quantity:
953
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3.14.8
3.14.9
8077H–AVR–12/09
SPH - Stack Pointer Register High
SREG - Status Register
Note:
• Bits 7:0 - SP[15:8]: Stack Pointer Register High byte
These bits hold the 8 MSB of the 16-bits Stack Pointer (SP).
The Status Register (SREG) contains information about the result of the most recently executed
arithmetic or logic instruction.
• Bit 7 – I: Global Interrupt Enable
The Global Interrupt Enable bit must be set for interrupts to be enabled. If the Global Interrupt
Enable Register is cleared, none of the interrupts are enabled independent of the individual
interrupt enable settings. The I-bit is not cleared by hardware after an interrupt has occurred.
The I-bit can be set and cleared by the application with the SEI and CLI instructions, as
described in the “Instruction Set Description”.
• Bit 6 – T: Bit Copy Storage
The Bit Copy instructions Bit Load (BLD) and Bit Store (BST) use the T-bit as source or destina-
tion for the operated bit. A bit from a register in the Register File can be copied into T by the BST
instruction, and a bit in T can be copied into a bit in a register in the Register File by the BLD
instruction.
• Bit 5 – H: Half Carry Flag
The Half Carry Flag (H) indicates a Half Carry in some arithmetic operations. Half Carry Is useful
in BCD arithmetic. See the “Instruction Set Description” for detailed information.
• Bit 4 – S: Sign Bit, S = N
The Sign bit is always an exclusive or between the Negative Flag N and the Two’s Complement
Overflow Flag V. See the “Instruction Set Description” for detailed information.
• Bit 3 – V: Two’s Complement Overflow Flag
The Two’s Complement Overflow Flag (V) supports two’s complement arithmetics. See the
“Instruction Set Description” for detailed information.
• Bit 2 – N: Negative Flag
The Negative Flag (N) indicates a negative result in an arithmetic or logic operation. See the
“Instruction Set Description” for detailed information.
Bit
+0x0E
Read/Write
Initial Value
Bit
+0x0F
Read/Write
Initial Value
1. Refer to specific device datasheets for exact initial values.
(1)
R/W
R/W
7
0
I
0/1
7
R/W
R/W
0/1
T
6
0
6
⊕
V
R/W
R/W
0/1
H
5
5
0
R/W
0/1
R/W
4
S
4
0
SP[15:8]
R/W
0/1
3
R/W
3
V
0
R/W
0/1
2
R/W
2
N
0
R/W
0/1
1
R/W
Z
1
0
XMEGA A
R/W
0/1
0
R/W
C
0
0
SPH
SREG
16
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