Datasheet

EVAL-ADP1655
Rev. 0 | Page 9 of 20
EVALUATION BOARD OVERVIEW
MOTHERBOARD
CONNECT MOTHERBOARD TO
DAUGHTERBOARD DIRECTLY AT
HEADER OR WITH RIBBON CABLE
CY68013 A MICROCONTROLLER:
PROVIDES USB-TO-I
2
C CONVERSION
TORCH AND STROBE: USE PUSH-BUTTONS FOR
EXTERNAL TORCH OR FLASH. BUTTONS HAVE
TO BE ENABLED FROM SOFTWARE GUI.
USB MINI B TYPE
CONNECTOR
ADP3303: 3.3V, 200mA
LDO SUPPLY FOR
CY68013A
U39, ADP1712:
ADJUSTABLE 300mA LDO AND U40,
AD5622: I
2
C-CONTROLLED
DAC ADJUSTABLE VDDIO
SUPPLY
JP15: SUPPLY
SELECTION FOR U36
AND U39
USE JP16 TO POWER VIC FROM USB
SUPPLY (USEFUL WHEN NO
EXTERNAL DC SUPPLY AVAILABLE)
U36, ADP1864: STEP-DOWN DC-TO-DC
CONTROLLER AND U38, AD5622:
I
2
C-CONTROLLED DAC
ADJUSTABLE VIC SUPPLY
08032-014
Figure 13. Motherboard
The ADP1655 motherboard provides the interface signals to the
ADP1655 flash driver IC. Signals of the interface are controlled
via the evaluation software GUI.
The Cypress Semiconductor Corporation CY68013A provides
the USB interface and I
2
C signals. The selected I
2
C frequency is
400 kHz. The EEPROM U5 M24C64 provides the USB address
of the board. The interface VDDIO voltage is adjusted using
evaluation software GUI and is set to 1.9 V by default.
Typically, the daughterboard is inserted directly into the 20-pin
header of the motherboard. For temperature measurements,
however, the ribbon cable provided with the evaluation kit must
be used to connect the motherboard and the daughterboard
because the Cypress CY68013A is not rated at −40°C.
Table 1. Recommended Jumper Setting
Jumper Function Setting
JP15 Motherboard regulator input
voltage selection
Short 1 and 2 (USB
powered)
JP16 ADP1655 input voltage
selection
Open