ATMEGA8HVA-4TU Atmel, ATMEGA8HVA-4TU Datasheet - Page 162

• Manufacturer Part Number: ATMEGA8HVA-4TU
• Description: MCU AVR 8K FLASH 4MHZ 28-TSOP
• Manufacturer: Atmel
• Series: AVR® ATmegar

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

28. Operating Circuit
162
ATmega8HVA/16HVA
Figure 28-1. Operating Circuit Diagram, 2-cell.
Notes:
1. The series resistors on the SPI lines are required for In-System Programming and On-chip
2. PA1 should be connected to SGND when measuring V(RT
3. It is recommended to connect CF1P, CF2N, and CF2P to GND.
Debug support. The value of the series resistor depends on the application. A value of 10k will
ensure that programming and debugging operates correctly, but it must be determined by the
end user that this does not affect the normal operation of the SPI interface.
PA0 should be connected to SGND when measuring V(RT
Rsense
0.010
470
470
470
Rpi
100
Rni
100
RP
RP
RP
RT2
0.1uF
0.1uF
0.1uF
RT1
R1
10K
CP
CP
Ci
PV2
PV1
NV
PI
NI
PA1/ADC1/SGND
PA0/ADC0/SGND
VREF
ATmega8HVA/16HVA
CREF
1 uF
VREFGND
OC
Rcf
1k
VFET
GND
OD
Rdf
1k
RESET
BATT
CRESET
0.1 uF
Rbatt
1k
(MISO) PB3
(MOSI) PB2
(SCK) PB1
(SS) PB0
VREG
CF1N
VCC
PC0
2
1
).
).
CVCC
0.1 uF
Serial communication
CREG
2.2 uF
SPI-communication
8024A–AVR–04/08
+
-
BATT +
BATT -
(1)