ATMEGA8HVA-4TU Atmel, ATMEGA8HVA-4TU Datasheet - Page 123
![MCU AVR 8K FLASH 4MHZ 28-TSOP](/photos/7/21/72191/313-28-tsop_sml.jpg)
ATMEGA8HVA-4TU
Manufacturer Part Number
ATMEGA8HVA-4TU
Description
MCU AVR 8K FLASH 4MHZ 28-TSOP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16HVA-4CKU.pdf
(196 pages)
Specifications of ATMEGA8HVA-4TU
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
7
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 9 V
Data Converters
A/D 5x12b
Oscillator Type
External
Operating Temperature
-20°C ~ 85°C
Package / Case
28-TSOP
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 123 of 196
- Download datasheet (3Mb)
22.3
22.4
22.4.1
8024A–AVR–04/08
Voltage Regulator Monitor
Register Description
ROCR – Regulator Operating Condition Register
This module monitors the operating state of the Voltage Regulator. If the voltage at VFET drops
below the Regulator Short-circuit Level (RSCL), see
Voltage Regulator enters the Battery Pack Short mode. In this mode, VFET is disconnected from
VREG to avoid a quick drop in the voltage regulator output. When the voltage regulator enters
this mode, the chip will be completely powered by the external reservoir capacitor (CREG). This
allows the chip to operate a certain time without entering BOD reset, even if the VFET voltage is
too low for the voltage regulator to operate.
An interrupt is issued when the regulator enters Battery Pack Short mode, if the ROCWIE bit in
ROCR Register is set. This allows actions to be taken to reduce power consumption and hence
prolonging the time that CREG can be used to power the chip. In a typical short-circuit situation,
VFET will drop as a consequence of high current consumption, and recover as soon as the Bat-
tery Protection module has disabled the FETs. Hence CREG should be dimensioned so that the
chip can sustain operation without entering BOD reset, until the FETs are disabled either by HW
or SW. To minimize power consumption when the Voltage Regulator enters the Battery Pack
Short mode, the chip should enter Power-save sleep mode as soon as possible after the ROC-
WIF interrupt is detected. The Watchdog Timer should be configured to wake up the CPU after a
time that is considered safe, see appnote AVR132 for use of enhanced Watchdog Timer. Soft-
ware should then check the status of the ROC flag. If the ROCS flag is cleared, normal operation
may be resumed.
• Bit 7 – ROCS: ROC Status
This bit is set when the Voltage Regulator operates in the Battery Pack Short mode, and cleared
otherwise.
• Bit 6:2 – Res: Reserved Bits
These bits are reserved bits and will always read as zero.
• Bit 1 – ROCWIF: ROC Warning Interrupt Flag
The ROCWIF Flag is set within the ROCW reaction time when the Voltage Regulator enters the
Battery Pack Short mode. The flag is cleared by writing a logic one to it or by hardware, by exe-
cuting the corresponding interrupt handling vector.
• Bit 0 – ROCWIE: ROC Warning Interrupt Enable
The ROCWIE bit enables interrupt caused by the Regulator Operating Condition Warning inter-
rupt flag.
Bit
(0xC8)
Read/Write
Initial Value
ROCS
R
7
0
R
6
0
-
R
5
0
-
R
4
0
-
R
0
3
-
”Electrical Characteristics” on page
ATmega8HVA/16HVA
R
2
0
-
ROCWIF
R/W
1
0
ROCWIE
R/W
0
0
ROCR
165, the
123
Related parts for ATMEGA8HVA-4TU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATMEGA128RFA1-ZU](/photos/12/13/121326/313-64-qfn_tmb.jpg)
Part Number:
Description:
IC AVR MCU 2.4GHZ XCEIVER 64QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA328P-20PU](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel
Datasheet:
![ATMEGA64RZAV-10PU](/photos/14/18/141872/atmega64rzav-10pu_tmb.jpg)
Part Number:
Description:
MCU ATMEGA644/AT86RF230 40-DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA64RZAPV-10MU](/photos/12/13/121326/313-64-qfn_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA644P/AT86RF230 QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA64RZAPV-10AU](/photos/6/70/67042/313-44-tqfp_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA644P/AT86RF230 TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA128RZAV-8AU](/photos/12/13/121332/313-64-tqfp_tmb.jpg)
Part Number:
Description:
MCU ATMEGA1281/AT86RF230 64-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA128RZBV-8AU](/photos/6/70/67048/313-100-tqfp_tmb.jpg)
Part Number:
Description:
MCU ATMEGA1280/AT86RF230 100TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA128RZBV-8CU](/photos/6/70/67048/313-100-tqfp_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA1280/AT86RF100-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA256RZBV-8CU](/photos/6/89/68968/313-100-cbga_tmb.jpg)
Part Number:
Description:
BUNDLE ATMEGA2560V/AT86RF230-ZU
Manufacturer:
Atmel
Datasheet:
![ATMEGA256RZAV-8AU](/photos/12/13/121332/313-64-tqfp_tmb.jpg)
Part Number:
Description:
MCU ATMEGA2561/AT86RF230 64-TQFP
Manufacturer:
Atmel
Datasheet:
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet: