Product Specs

4
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Subject: Doc. No.: Rev: 0.6
UMC-STD31BPN Product Specification Page 43 of 55
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The information contained herein is the exclusive property of WNC and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission from WNC.
Form No.: 2-JT-00022-03_001
UMC-STD31BPN Product Specification
43
Q6/Q7
VSYS
System supply-feed power of NAD
P6
PMIC_ENB
Pull this pin low to power NAD on
P7
PMIC_RESET_B
Pull this pin low to trigger the reset of PMIC
H7
SYSRSTB
Pull this pin low to reset NAD without resetting the
power ON/OFF sequence of PMIC
8.3 USB2.0
WNC enable only 1 USB2.0 port for customer ,If customer want to use extra USB port, please contact with
WNC .
8.4 USB2.0 OTG
The total routing length of HS-USB signal traces should be less than 7500-mil and designed with 90-OHM
line impedance on the application board, and the difference length of differential pair signals shall be kept
within 40-mil
NAD
Pad#
NAD Pad Name
Pin Function Description
B8
USB_DM_P0
USB 2.0 OTG differential pair signal
B9
USB_DP_P0
USB 2.0 OTG differential pair signal
A12
IDDIG
ID pin of USB 2.0 OTG interface
L4
VBUS
Ex-VBUS detect signal
(support host mode & device mode)
8.5 I2C
I2C is internally pulled-up by 3.3V with 4.7K-OHM resistor. Push-pull is recommended for high speed mode.
Open-drain is recommended for standard, fast and fast plus mode
NAD
Pad#
Pin Function
Description
GPIO Name
I/O Type
E11
SCL0
GPIO42
Push-pull / Open-drain
D10
SDA0
GPIO41
Push-pull / Open-drain
8.6 RGMII
Signal voltage level is required 3.3-Volatge,trace length <6000mil(Ch loading~15pf),CLK:guarding by
GND,DATA:guarding by GND,trace difference <700mil,trace width/trace is 1W/1W.
Ethernet interface can be configured as MII or RMII or RGMII interface. Below list shows the different
configuration for different interfaces. Default setting is RGMII interface. User can follow this list to
configure pin to implement MII or RMII.
LGA PAD
No
LGA PAD name
MII
RMII
RGMII