ATMEGA16HVA-4TU Atmel, ATMEGA16HVA-4TU Datasheet - Page 124

• Manufacturer Part Number: ATMEGA16HVA-4TU
• Description: MCU AVR 16K FLASH 4MHZ 28-TSOP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16HVA-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: 16KB (8K 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

23. Battery Protection
23.1
23.2
Table 23-1.
124
Battery Protection Type
Short-circuit Protection
Discharge Over-current
Protection
Charge Over-current
Protection
Discharge High-current
Protection
Charge High-current
Protection
Features
Overview
ATmega8HVA/16HVA
Effect of Battery Protection Types
•
•
•
•
•
•
•
The Current Battery Protection circuitry (CBP) monitors the charge and discharge current and
disables C-FET and D-FET if a Short-circuit, Over-current or High-current condition is detected.
There are five different programmable detection levels: Short-circuit Detection Level, Discharge
Over-current Detection Level, Charge Over-current Detection Level, Discharge High-current
Detection Level, Charge High-current Detection Level. There are three different programmable
delays for activating Current Battery Protection: Short-circuit Reaction Time, Over-current Reac-
tion Time and High-current Reaction Time. After Current Battery Protection has been activated,
the application software must re-enable the FETs. The Battery Protection hardware provides a
hold-off time of 1 second before software can re-enable the discharge FET. This provides safety
in case the application software should unintentionally re-enable the discharge FET too early.
The activation of a protection also issues an interrupt to the CPU. The battery protection inter-
rupts can be individually enabled and disabled by the CPU.
The effect of the various battery protection types is given in
In order to reduce power consumption, Short-circuit, Discharge High-current and Discharge
Over-current Protection are automatically deactivated when the D-FET is disabled. The Charge
Over-current and Charge High-current Protection are disabled when the C-FET is disabled. Note
however that Charge Over-current Protection and Charge High-current Protection are never
automatically disabled when the chip is operated in DUVR mode.
Short-circuit Protection
Discharge Over-current Protection
Charge Over-current Protection
Discharge High-current Protection
Charge High-current Protection
Programmable and Lockable Detection Levels and Reaction Times
Autonomous Operation Independent of CPU
Interrupt Requests
Entry
Entry
Entry
Entry
Entry
Disabled
Disabled
Disabled
Disabled
Disabled
C-FET
Disabled
Disabled
Disabled
Disabled
Disabled
D-FET
Table
23-1.
Operational
Operational
Operational
Operational
Operational
MCU
8024A–AVR–04/08