ATxmega128A1 Atmel Corporation, ATxmega128A1 Datasheet - Page 195
ATxmega128A1
Manufacturer Part Number
ATxmega128A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128A1
Flash (kbytes)
128 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)
8
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
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17.3.10
17.3.11
8077H–AVR–12/09
COMPH - Real Time Counter Compare Register H
COMPL - Real Time Counter Compare Register L
The COMPH and COMPL register pair represent the 16-bit value COMP. COMP is constantly
compared with the counter value (CNT). A compare match will set the COMPIF in the INT-
FLAGS register. Reading and writing 16-bit values require special attention, refer to
”Configuration Change Protection” on page 12
Due to synchronization between RTC clock and the system clock domains, there is a latency of
two RTC clock cycles from updating the register until this has an effect. Application SW needs to
check that the SYNCBUSY flag in the
192
If the COMP value is higher than the PER value, no RTC Compare Match interrupt requests or
events will ever be generated.
• Bits 7:0 - COMP[15:8]: Real Time Counter Compare Register High byte
These bits hold the 8 MSB of the 16-bit RTC compare value.
• Bits 7:0 - COMP[7:0]: Real Time Counter Compare Register Low byte
These bits hold the 8 LSB of the 16-bit RTC compare value.
Bit
+0x0D
Read/Write
Initial Value
Bit
+0x0C
Read/Write
Initial Value
is cleared before writing to this register.
R/W
R/W
7
0
7
0
R/W
R/W
6
0
6
0
R/W
R/W
5
0
5
0
”STATUS - Real Time Counter Status Register” on page
R/W
R/W
4
0
4
0
COMP[15:8]
COMP[7:0]
for details.
R/W
R/W
3
0
3
0
R/W
R/W
2
0
2
0
R/W
R/W
1
0
1
0
XMEGA A
R/W
R/W
0
0
0
0
COMPH
COMPL
195
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