CY7C67200
Charge Pump Features
• Meets OTG Supplement Requirements, see
Charge Pump Pins
Table 11.Charge Pump Interface Pins
Pin Name
OTGVBUS
CSwitchA
CSwitchB
Booster Interface
EZ-OTG has an on-chip power booster circuit for use with
power supplies that range between 2.7V and 3.6V. The
booster circuit boosts the power to 3.3V nominal to supply
power for the entire chip. The booster circuit requires an
external inductor, diode, and capacitor. During power down
mode, the circuit is disabled to save power.
shows
how to connect the booster circuit.
Figure 2. Power Supply Connection With Booster
Pin Number
C1
D1
D2
Figure 3. Power Supply Connection Without Booster
BOOSTVcc
3.0V to 3.6V
Power Supply
VSWITCH
VCC
AVCC
Booster Pins
Table 12.Charge Pump Interface Pins
Pin Name
BOOSTVcc
VSWITCH
Pin Number
F1
E2
BOOSTVcc
L1
2.7V to 3.6V
Power Supply
Crystal Interface
The recommended crystal circuit to be used with EZ-OTG is
shown in
If an oscillator is used instead of a crystal
circuit, connect it to XTALIN and leave XTALOUT uncon-
nected. For further information on the crystal requirements,
see
Figure 4. Crystal Interface
VSWITCH
D1
3.3V
VCC
AVCC
C1
XTALIN
Component details:
• L1: Inductor with inductance of 10 µH and a current rating
of at least 250 mA
• D1: Schottky diode with a current rating of at least 250 mA
• C1: Tantalum or ceramic capacitor with a capacitance of at
least 2.2 µF
shows how to connect the power supply when the
booster circuit is not being used.
CY7C67200
Y1
XTALOUT
C1 = 22 pF
12MHz
Parallel Resonant
Fundamental Mode
500uW
20-33pf ±5%
C2 = 22 pF
Document #: 38-08014 Rev. *G
Page 6 of 78
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