Datasheet

163
8024A–AVR–04/08
ATmega8HVA/16HVA
Figure 28-2. Operating Circuit Diagram, 1-cell
Notes: 1. The series resistors on the SPI lines are required for In-System Programming and On-chip
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.
2. PA1 should be connected to SNGD when measuring V(RT
2
).
PA0 should be connected to SNGD when measuring V(RT
1
).
RP
RP
Rsense
Rpi
Rni
AT m e g a8HVA/16HVA
VFET
+
-
PV2
PV1
NV
PI
NI
RESET
VREG
GND
RP
100
100
0.1uF
0.010
470
470
CREG
2.2 uF
VREFGNDVREF
0.1uF
VCC
BATT +
BATT -
Rcf
1k
Rdf
1k
OC OD BATT
Rbatt
1k
CF1P
CF1N
CF2P
CF2N
CVCC
0.1 uF
CF1
CF2
220 nF
220 nF
(SCK) PB1
(MISO) PB3
(MOSI) PB2
SPI-communication
(1)
470
Ci
CP
CREF
1 uF
RT2 RT1
PA1/ADC1/SGND
PA0/ADC0/SGND
R1
10K
(SS) PB0
PC0
Serial communication