ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 110

• Manufacturer Part Number: ATMEGA8HVD-4MX
• Description: MCU AVR 8K FLASH 2.1-8V 4MHZ QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8HVD-4MX

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• 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): 2 V ~ 2.4 V
• Data Converters: A/D 1x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 18-MLF® Exposed Pad (Staggered Leads), DFN
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -

20.8.3
20.8.4
110
ATmega4HVD/8HVD
BPSCTR – Battery Protection Short-current Timing Register
BPOCTR – Battery Protection Over-current Timing Register
• Bit 7 – Res: Reserved Bits
This bit is reserved and will always read as zero.
• Bit 6:0 – SCPT6:0: Short-current Protection Timing
These bits control the delay of the Short-circuit Protection. The Short-circuit Timing can be set
with a step size of 62.5 µs as shown in
Table 20-2.
Notes:
Note:
• Bit 7:6 – Res: Reserved Bits
These bits are reserved and will always read as zero.
• Bit 5:0 – OCPT5:0: Over-current Protection Timing
These bits control the delay of the Over-circuit Protection. The Over-current Timing can be set
with a step size of 0.5 ms as shown in
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
1. The actual value depends on the actual frequency of the
2. Initial value: SCPT[0x10](1ms).
3. An additional delay up to T
Due to synchronization of parameters between clock domains, a guard time of 3 ULP oscillator
cycles + 3 CPU clock cycles is required between each time the BPSCTR register is written. Any
writing to the BPSCTR register during this period will be ignored.
page
ization of the protection circuit. With nomial ULP frequency this delay is maximum 55 µs.
Short-circuit Protection Reaction Time. SCPT[6:0] with corresponding Short-cir-
cuit Delay Time.
24. See
R
R
7
–
0
7
–
0
SCPT[6:0]
0x7E
0x7F
0x00
0x01
0x02
0x03
...
”Electrical Characteristics” on page
R/W
R
6
0
6
–
0
(2)
Short-circuit Protection Reaction Time
R/W
R/W
5
0
5
0
d
can be expected after enabling the Discharge FET due to initial-
Table 20-3 on page
Table 20-2 on page
R/W
R/W
4
1
4
0
SCPT[6:0]
R/W
R/W
3
0
3
0
OCPT[5:0]
142.
111.
110.
R/W
R/W
(148.0 - 211.0 µs) + T
2
0
2
0
(85.5 - 148.5 µs) + T
(7.84 - 7.90 ms) + T
(7.90 - 7.96 ms) + T
(23.0 - 86.0 µs) + T
(23.0 - 86.0 µs) + T
”Ultra Low Power RC Oscillator” on
(1)
R/W
R/W
1
0
1
1
Typ
...
R/W
R/W
0
0
0
0
d
d
d
d
d
8052B–AVR–09/08
(3)
(3)
(3)
(3)
d
(3)
(3)
BPSCTR
BPOCTR