Table of Contents
Advertisement
3. Detailed Description of Functions
3.1
Power Supply
The evaluation board generates 3.3 V and 1.8 V power supplies via a regulator from the single 5 V
DC power supply received from the J5 PC USB interface connector. Space is also provided for an
optional AC adapter (CENTER -, minimum rated output 1 A, DC jack external diameter 5.5 mm,
internal diameter 2.1 mm). When using both the USB and AC adapter power supplies, select one of
the two using the SW3 power supply selector switch designed to prevent shorting between the two
power supply inputs. See Table 3-1.
LED4 indicates whether the power supply is on or off, illuminating when the power supply is on and
going out when the power supply is off. See Table 3-2.
SW3 setting
3.2
Clocks
Table 3-3 lists the different IC clocks used on the evaluation board.
S1V30333/300/120 Evaluation Board
User Guide (Rev. 1.03)
Table 3-1 Power supply selection
Power supply
BUS
USB power supply
SELF
AC adapter power supply
Table 3-2 LED4 power supply switching
Power supply
on/off
ON
OFF
Table 3-3 Clocks
Frequency
12.288MHz
32.768kHz
14.7456MHz
3. Detailed Description of Functions
Component: CLIFF
FC68148 or equivalent
LED4 state
Illuminated
Off
Use
S1V30333 clock
S1V30300 clock
S1V30120 clock
S1C33E07 RTC clock
S1C33E07 system clock
EPSON
Remarks
Default
Remarks
7
Advertisement
Table of Contents
