ATxmega16A4 Atmel Corporation, ATxmega16A4 Datasheet - Page 359

• Manufacturer Part Number: ATxmega16A4
• Manufacturer: Atmel Corporation

Specifications of ATxmega16A4

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Speed: No
• Usb Interface: No
• Spi: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 3.3
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• 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: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

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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