CY7C67300-100AI Cypress Semiconductor Corp, CY7C67300-100AI Datasheet - Page 11

• Manufacturer Part Number: CY7C67300-100AI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C67300-100AI

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: TQFP
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

Booster Interface
EZ-Host 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.
Figure 6. Power Supply Connection With Booster
Component details:
■
■
■
Figure 7
booster circuit is not being used.
Figure 7. Power Supply Connection Without Booster
Document #: 38-08015 Rev. *J
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
BOOSTVcc
BOOSTVcc
VSWITCH
VSWITCH
AVCC
AVCC
VCC
VCC
shows how to connect the power supply when the
Figure 6
3.3V
shows how to connect the booster circuit.
L1
C1
D1
2.7V to 3.6V
Power Supply
3.0V to 3.6V
Power Supply
Booster Pins
Table 17. Charge Pump Interface Pins
Crystal Interface
The recommended crystal circuit to be used with EZ-Host is
shown in
circuit, connect it to XTALIN and leave XTALOUT unconnected.
For further information about the crystal requirements, see
132, Crystal Requirements on page
Noted that the CLKSEL pin (pin 38) is sampled after reset to
determine what crystal or clock source frequency is used. For
normal operation, 12 MHz is required so the CLKSEL pin must
have a 47K ohm pull up resistor to V
Figure 8. Crystal Interface
Crystal Pins
Table 18. Crystal Pins
CY7C67300
BOOSTVcc
Figure 8
Pin Name
VSWITCH
Pin Name
XTALOUT
XTALOUT
XTALIN
XTALIN
If an oscillator is used instead of a crystal
C1 = 22 pF
Y1
83.
CC.
12MHz
Parallel Resonant
Fundamental Mode
500uW
20-33pf ±5%
.
Pin Number
Pin Number
C2 = 22 pF
CY7C67300
16
14
29
28
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