CY7C67300_13 Datasheet, PDF (14/112 Pages) Cypress Semiconductor – EZ-Host™ Programmable Embedded USB Host and Peripheral Controller with Automotive AEC Grade Support

CY7C67300
Minimum Hardware Requirements for Standalone Mode – Peripheral Only
Figure 9. Minimum Standalone Hardware Configuration – Peripheral Only
Standard-B
or Mini-B
VReg
VBus
D+
D-
GND
SHIELD
Bootstrap Options
Vcc Vcc
10k 10k
GPIO[30]
GPIO[31]
EZ-Host
CY7C67300
VCC, AVCC, nRESET
BoostVCC
DPlus
DMinus
Reset
Logic
SCL*
SDA*
VCC
47Kohm
Pin 38
Int. 16k x8
Code / Data
VCC
Bootloading Firmware
A0
A1
A2
GND
Up to 64k x8
EEPROM
VCC
WP
SCL
SDA
*Bootloading begins after POR + 3ms BIOS bootup
*GPIO[31:30]
31 30
Up to 2k x8
SCL SDA
>2k x8 to 64k x8 SDA SCL
Reserved
GND, AGND,
BoostGND
22pf
XIN
12MHz
XOUT
22pf
* _{Parallel Resonant}
Fundamental Mode
500uW
20-33pf ±5%
Power Savings and Reset Description
This sections describes the different modes for resetting the chip
and ways to save power.
Power Saving Mode Description
EZ-Host has one main power saving mode, Sleep. For detailed
information about Sleep mode, see the Sleep section that
follows.
Sleep mode is used for USB applications to support USB
suspend and non USB applications as the main chip power down
mode.
In addition, EZ-Host is capable of slowing down the CPU clock
speed through the CPU Speed register [0xC008] without
affecting other peripheral timing. Reducing the CPU clock speed
from 48 MHz to 24 MHz reduces the overall current draw by
around 8 mA while reducing it from 48 MHz to 3 MHz reduces
the overall current draw by approximately 15 mA.
Sleep
Sleep mode is the main chip power down mode and is also used
for USB suspend. Sleep mode is entered by setting the Sleep
Enable (bit 1) of the Power control register [0xC00A]. During
Sleep mode (USB Suspend) the following events and states are
true:
■ GPIO pins maintain their configuration during sleep (in
suspend)
■ External Memory address pins are driven low
■ XTALOUT is turned off
■ Internal PLL is turned off
■ Ensure that firmware disables the charge pump (OTG Control
register [0xC098]) thereby causing OTGVBUS to drop below
0.2V. Otherwise OTGVBUS only drops to V_CC – (2 schottky
diode drops).
■ Booster circuit is turned off
■ USB transceivers is turned off
■ CPU goes into suspend mode until a programmable wakeup
event
Document Number: 38-08015 Rev. *L
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