ATAVRDISPLAYX Atmel, ATAVRDISPLAYX Datasheet - Page 194

• Manufacturer Part Number: ATAVRDISPLAYX
• Description: KIT EVAL XMEGA DISPLAY
• Manufacturer: Atmel

Specifications of ATAVRDISPLAYX

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Silicon Manufacturer: Atmel
• Silicon Family Name: ATxmega
• Kit Contents: Board
• Features: Temperature Sensor, Mono Speaker Via Audio Amplifier
• Svhc: No SVHC (15-Dec-2010)
• Core Architecture: AVR
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.3.7
17.3.8
17.3.9
8077H–AVR–12/09
CNTL - Real Time Counter Register L
PERH - Real Time Counter Period Register High
PERL - Real Time Counter Period Register L
• Bits 7:0 - CNT[15:8]: Real Time Counter value High byte
These bits hold the 8 MSB of the 16-bit Real Time Counter value.
• Bits 7:0 - CNT[7:0]: Real Time Counter value Low byte
These bits hold the 8 LSB of the 16-bit Real Time Counter value.
The PERH and PERL register pair represents the 16-bit value PER. PER is constantly com-
pared with the counter value (CNT). A match will set the OVFIF in the INTFLAGS register and
clear CNT. Reading and writing 16-bit values require special attention, refer to
bits Registers” 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 software
needs to check that the SYNCBUSY flag in the
on page 192
• Bits 7:0 - PER[15:8]: Real Time Counter Period High byte
These bits hold the 8 MSB of the 16-bit RTC top value.
• Bits 7:0 - PER[7:0]: Real Time Counter Period Low byte
These bits hold the 8 LSB of the 16-bit RTC top value.
Bit
+0x0B
Read/Write
Initial Value
Bit
+0x08
Read/Write
Initial Value
Bit
+0x0A
Read/Write
Initial Value
is cleared before writing to this register.
R/W
R/W
R/W
7
1
7
0
7
1
R/W
R/W
R/W
6
1
6
0
6
1
for details.
R/W
R/W
R/W
5
0
5
1
5
1
R/W
R/W
R/W
4
0
4
1
4
1
PER[15:8]
CNT[7:0]
PER[7:0]
”STATUS - Real Time Counter Status Register”
R/W
R/W
R/W
3
0
3
1
3
1
R/W
R/W
R/W
2
0
2
1
2
1
R/W
R/W
R/W
1
0
1
1
1
1
XMEGA A
R/W
R/W
R/W
”Accessing 16-
0
0
0
1
0
1
CNTL
PERH
PERL
194