ATA6613P-PLPW Atmel, ATA6613P-PLPW Datasheet - Page 73

• Manufacturer Part Number: ATA6613P-PLPW
• Description: MCU W/LIN TXRX REG WTCHDG 48-QFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6613P-PLPW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-QFN Exposed Pad
• Processor Series: ATA6x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI, TWI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.8.7
6.8.8
6.8.8.1
9111H–AUTO–01/11
MCU Status Register – MCUSR
Internal Voltage Reference
Voltage Reference Enable Signals and Start-up Time
The MCU Status Register provides information on which reset source caused an MCU reset.
Atmel ATA6612/ATA6613 features an internal bandgap reference. This reference is used for
Brown-out Detection, and it can be used as an input to the Analog Comparator or the ADC.
The voltage reference has a start-up time that may influence the way it should be used. The
start-up time is given in
turned on. The reference is on during the following situations:
Thus, when the BOD is not enabled, after setting the ACBG bit or enabling the ADC, the user
must always allow the reference to start up before the output from the Analog Comparator or
ADC is used. To reduce power consumption in Power-down mode, the user can avoid the
three conditions above to ensure that the reference is turned off before entering Power-down
mode.
• Bit 7..4: Res: Reserved Bits
• Bit 3 – WDRF: Watchdog System Reset Flag
• Bit 2 – BORF: Brown-out Reset Flag
• Bit 1 – EXTRF: External Reset Flag
• Bit 0 – PORF: Power-on Reset Flag
1. When the BOD is enabled (by programming the BODLEVEL [2..0] Fuses).
2. When the bandgap reference is connected to the Analog Comparator (by setting the
3. When the ADC is enabled.
Initial Value
Read/Write
These bits are unused bits in the Atmel
zero.
This bit is set if a Watchdog System Reset occurs. The bit is reset by a Power-on Reset,
or by writing a logic zero to the flag.
This bit is set if a Brown-out Reset occurs. The bit is reset by a Power-on Reset, or by writ-
ing a logic zero to the flag.
This bit is set if an External Reset occurs. The bit is reset by a Power-on Reset, or by writ-
ing a logic zero to the flag.
This bit is set if a Power-on Reset occurs. The bit is reset only by writing a logic zero to the
flag.
To make use of the Reset Flags to identify a reset condition, the user should read and
then Reset the MCUSR as early as possible in the program. If the register is cleared
before another reset occurs, the source of the reset can be found by examining the Reset
Flags.
Bit
ACBG bit in ACSR).
R
7
–
0
Table 6-23 on page
R
6
–
0
R
5
–
0
R
4
–
0
®
Atmel ATA6612/ATA6613
74. To save power, the reference is not always
ATA6612/ATA6613, and will always read as
WDRF
R/W
3
See Bit Description
BORF
R/W
2
EXTRF
R/W
1
PORF
R/W
0
MCUSR
73