24-Aug.-2007 Ver.0.1
TAIYO YUDEN Confidential
& Tentative
TAIYO YUDEN
38/40
EYSMJCS
Pin Descriptions
Terminal
No.
Terminal name
Input/Output
Description
Remark
1 GND
-
Ground
2 PIO2/USB_DETACH Input
DETACH signal input
Low USB connect
High USB disconnect
Note 1
3 /RESET
Input
Active low RESET signal with internal weak
pull-up
Note 2
4
USB_D-
Input/Output
USB data (Negative) input-output
5
USB_D+
Input/Output
USB data (Positive) input-output
6
VDD
Input
DC3.3V Power supply
Note 3
Notes:
1. Strength pull-downs (pull-ups) are equivalent to a few kOhms resistance, but are more accurately modeled as
a 40uA current drain (source).
2. Weak pull-ups can be thought of 1M Ohm connections to VDD, but are more accurately modeled as a -1uA
current source.
3. Pin 6 (VDD) is used for power supply of BT module. To fill the standard of “Supply voltage ripple and spike
noise”, the capacitor, which has the capacity of 2.2uF or more, should be put in the terminal VDD outside as
a bypass capacitor.
Control No.
HD-BA-A071063 (1/1)
Control name
Pin Layout
