ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 143

• Manufacturer Part Number: ATxmega256A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Speed: No
• Usb Interface: No
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• 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: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

13.15 Register Description – Multiport Configuration
13.15.1
13.15.2
8077H–AVR–12/09
MPCMASK - Multi-pin Configuration Mask Register
VPCTRLA - Virtual Port-map Control Register A
• Bit 2:0 - ISC[2:0]: Input/Sense Configuration
These bits set the input and sense configuration on pin n according to
configuration decides how the pin can trigger port interrupts and events. When the input buffer is
not disabled, the schmitt triggered input is sampled (synchronized) and can be read in the IN
register.
Table 13-5.
Note:
• Bit 7:0 - MPCMASK[7:0]: Multi-pin Configuration Mask
The MPCMASK register enables several pins in a port to be configured at the same time. Writing
a one to bit n allows that pin to be part of the multi-pin configuration. When a pin configuration is
written to one of the PINnCTRL registers of the port, that value is written to all the PINnCTRL
registers of the pins matching the bit pattern in the MPCMASK register for that port. It is not nec-
essary to write to one of the registers that is set by the MPCMASK register. The MPCMASK
register is automatically cleared after any PINnCTRL registers is written.
Bit
+0x00
Read/Write
Initial Value
Bit
+0x02
Read/Write
Initial Value
ISC[2:0]
000
001
010
011
100
101
110
111
1. A low pin value will not generate events, and a high pin value will continuously generate
2. Only Port A - F supports the input buffer disable option.
events.
R/W
R/W
7
0
7
0
Input/Sense Configuration
Group Configuration
BOTHEDGES
RISING
FALLING
LEVEL
INTPUT_DISABLE
R/W
R/W
6
0
6
0
VP1MAP[3:0]
R/W
R/W
5
0
5
0
R/W
R/W
4
0
4
0
MPCMASK[7:0]
Sense both edges
Sense rising edge
Sense falling edge
Sense low level
Reserved
Reserved
Reserved
Input buffer disabled
R/W
R/W
3
0
3
0
(1)
R/W
R/W
2
0
2
0
VP0MAP[3:0]
(2)
Description
R/W
R/W
1
0
1
0
Table
XMEGA A
13-5. The sense
R/W
R/W
0
0
0
0
MPCMASK
VPCTRLA
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