Cypress EZ-USB HX2LP, CY7C656xx manual System Block Diagram, Sample Schematic

PRELIMINARYCY7C656xx

14.0System Block Diagram

VCC

BUSPOWER

5V

PWR1

D–

D+

GND

D–

D+

2.2 ∝F	PWR1
	OVR1
10V
100 kΩ	PWR2
	OVR2
	PWR3

Power

Management

PWR4

PWR3

PWR2

		DD–[1]	VCC
∝			D–
150 F		DD+[1]
10V			D+
	0.01	∝
		F
			GND
			SHELL

SHELL

4.7 nF 250V

1 MΩ

OVR3

PWR4

OVR4

PWR1

680Ω

GREEN#[1]

3.3V

AMBER#[1] 680Ω

3V

12 pF

SPI_SD SPI_SCK

SPI_CS

24 MHz

SPI

EEPROM

12 pF

SPI_SD

PWR2		VCC
	DD–[2]
150 ∝F		D–
	DD+[2]
10V		D+
	0.01 ∝F
		GND
		SHELL
	680Ω	3.3V
GREEN#[2]
AMBER#[2]	680Ω

				VCC1 VCC2 VCC3 VCC4 VCC5 VCC6 VCC7 VCC8	VCC9 VCC10 VCC11			XIN		XOUT
		BUSPOWER		BUSPOWER
										GREEN[1]	GREEN[1]
3.3V										AMBER[1]	AMBER[1]
										GREEN[2]	GREEN[2]
	100K									AMBER[2]	AMBER[2]
				RESET						GREEN[3]	GREEN[3]
		0.1∝F	D–	D-						AMBER[3]	AMBER[3]
						HX2LP				GREEN[4]	GREEN[4]
			D+	D+
										AMBER[4]	AMBER[4]
			DD–[1]	DD-[1]						PWR1	PWR1
			DD+[1]	DD+[1]						OVR1	OVR1
										PWR2	PWR2
			DD–[2]	DD-[2]						OVR2	OVR2
			DD+[2]	DD+[2]						PWR3	PWR3
										OVR3	OVR3
			DD–[3]	DD-[3]						PWR4	PWR4
			DD+[3]	DD+[3]						OVR4	OVR4
										SPI_CS	SPI_CS
			DD–[4]	DD-[4]
										SPI_SCK	SPI_SCK
			DD+[4]	DD+[4]
										SPI_SD	SPI_SD
				GND1	GND2 GND3 GND4 GND5 GND6 GND7 GND8		GND9 GND10 GND11		GND12

PWR3			VCC
		DD-[3]
150	∝		D–
	F	DD+[3]
10V			D+
		∝
		0.01 F
			GND
			SHELL
		680Ω	3.3 V
GREEN#[3]
AMBER#[3]		680Ω
PWR4			VCC
		DD-[4]
150	∝		D–
	F	DD+[4]
10V			D+
		0.01 ∝F
			GND
			SHELL
		680Ω	3.3 V
GREEN#[4]
AMBER#[4]		680Ω

Figure 14-1. Sample Schematic

Document #: 38-08037 Rev. *D Page 20 of 23