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dc2026cfe
DEMO MANUAL DC2026C
BLOCK DIAGRAM
5V_USB
GND_USB
D
+
_USB
D
–
_USB
5V_ISO
GND_ISO
5V
USB
AC ADAP
TER
7V TO 20V
MAX 200mA
PC USB
D
+
_ISO
D
–
_ISO
LTM2884
USB ISOLA
TOR
LTC4411
IDEAL DIODE
FTDI
USB-TO-SERIAL
5V
D
+
D
–
TX
RX
DTR
LT3973 BUCK
MAX 750mA
IN
OUT
LT1761 LDO
ATMEGA328P
PINS A0-A5
PINS 2-13
PIN 13/SPI SCK
PIN A4/I
2
C SDA
PIN A5/I
2
C SCL
PIN 11/SPI MOSI
5V
PIN 0
PIN 1
RESET
SERIAL
I/O (FOR ADC)
I/O
LT3461 BOOST
MAX 750mA
IN
OUT
IN
OUT
3.3V
LT1761 LDO
LT1761 LDO
IN
OUT
IN
OUT
5V
LOW NOISE
VCCIO
VCCIO
5V
J1
5V
7V
7V
7.6V
5V
V
+
VCCIO
GPIO
SCL/SCK
SDA/MOSI
MISO
CS
GND
EEV
CC
EESCL
EEDA
EEGND
PIN 8
PIN A5
PIN A4
PIN NAMES CORRESPOND TO ARDUINO PINS. PIN 8 SWITCHES MUX BET
WEEN MICROCONTROLLER I
2
C POR
T (PINS A4, A5)
AND MICROCONTROLLER SPI POR
T (PINS 11, 13)
DEMO BOARD EEPROM (EESCI, EESDA) IS AL
W
AYS CONNECTED TO
MICROCONTROLLER I
2
C POR
T (PINS A4, A5)
DC2026 BD
V
CC
SCLIN
SDAIN
EN
DISCEN
ACC
V
CC2
SCLOUT
SDAOUT
READY
FAUL
T
TP3
TP4
PIN 8
PIN 8
PIN 12
PIN 9
+
–
VCCIO/2
LT1719
PIN 10
