Huawei MU609 - GPIO Interface Compatibility Design

HUAWEI 30 mm × 30 mm LGA Module
Hardware Migration Guide
LGA Interface Differences
Issue 08 (2016-12-12)
HUAWEI Proprietary and Confidential
Copyright © HUAWEI Technologies Co., Ltd.
29
Figure 2-12 The circuit diagram of audio interface
33 pF 33 pF
100 pF
ESD protection
33 pF
33 pF
100 pF
EAR_OUT_P
EAR_OUT_N
MIC1_P
MIC1_N
LGA
Network
Connector
2.4 GPIO Interface Compatibility Design
Please note the different signal level of GPIO between MU509/MC509 and
MU609/ME209u-526/ME909u/MU709/ME909s. The signal of MU509 and MC509 are
CMOS 2.6 V and MU609, MU709, ME209u-526, ME909u and ME909s are CMOS
1.8 V. Therefore, you must consider the compatibility during circuit designing.