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USB82642 数据表(PDF) 12 Page - Microchip Technology

部件名 USB82642
功能描述  Automotive USB 2.0 Hub and Flash Media Card Controller Combo
PDF  64 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB82642 数据表(HTML) 12 Page - Microchip Technology

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USB82642
DS60001253F-page 12
 2012-2021 Microchip Technology Inc.
Misc
GPO1
37
I/O12
This general purpose pin is set to be used as an
output.
Leave open
CRD_PWR
35
I/O200
Card power drive: 3.3 V (200 mA)
This pin powers the multiplexed flash media
interface (slot) for the SD/MMC interface.
Bits 0, 1, 2, and 3 control FET 2 of Register A5h.
See Section 7.5.2.11, "A4h-A5h: LUN 0 Power
Configuration," on page 27 for more information.
Leave open
NC
31
IPU
Leave open
REG_EN
22
IPU
Regulator Enable
This pin is internally pulled up to enable the
internal 1.8 V regulators. In order to disable the
regulators, this pin will need to be externally
connected to ground.
When the internal regulator is enabled, the 1.8 V
power pins must be left unconnected, except for
the required bypass capacitors.
N/A
RESET_N
38
I
RESET input
This active low signal is used by the system to
reset the chip. The active low pulse should be at
least 1 µs wide. In addition, consider Note 3 in
Section 8.2, Operating Conditions.
N/A
TEST[2:0]
28
27
40
IPD
TEST Input
Tie these test pins to ground for normal opera-
tion.
Connect to
ground.
Digital/Power/Ground
VDD18
15
-
1.8 V Digital Core Power Bypass
This pin requires an external bypass capacitor
of 1.0 µF.
If REG_EN is low, this pin serves as a power
supply (1.8 V) for the device.
VDD33
12
16
25
34
-
3.3 V Power and Regulator Input
• 48VQFN - Pin 16 requires an external
bypass capacitor of 4.7 µF minimum.
VDD33 (OTP)
26
-
3.3 V Power
VSS
ePad
-
Ground Pad
The ground pad is the only VSS for the device
and must be tied to ground with multiple vias.
TABLE 5-1:
USB82642 PIN DESCRIPTIONS (CONTINUED)
Symbol
48-Pin
VQFN
Buffer
Type
Description
If Pins not Used
Connection



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