Huawei U8860 Maintenance Manual page 67

U8860
Maintenance Manual
Signal
QTR_BT_PCM_SYNC
QTR_BT_PCM_BCLK
QTR_BT_HOST_WAKE
QTR_BT_EXT_WAKE
After the BT module is enabled, you can perform BT communication. You can know whether
the host or peripherals is woken up based on QTR_BT_HOST_WAKE or
QTR_BT_EXT_WAKE. The signal interfaces of QTR_BT_UART_TXD and
QTR_BT_UART_RXD control data transmission, determining to receive or transmit data.
QTR_BT_UART_CTS and QTR_BT_UART_RTS transmit status signals, and you can know
the BT status according to these two pins. Data transmission is performed by the four pins of
PCM.
The Wifi functions are implemented depending on the BCM4329, the communication of the
MSM8255 and BCM4329 adopts the SDIO bus of the SDIO3 interface. The signal definitions
are as follows:
Signal
SDC3_DATA3
SDC3_DATA2
SDC3_DATA1
SDC3_DATA0
SDC3_CLK
SDC3_CMD
After the WiFi function is enabled, the data transmission is controlled by SDC3_CLK and
SDC3_CMD, and is performed by the four data control pins.
Troubleshooting process
Failure: the BT and WiFi functions are abnormal.
Solution:
Issue 1.0 (2011-11-14)
Remarks
PCM synchronization
PCM clock
Waking up the host
Waking up the peripherals
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Copyright © Huawei Technologies Co., Ltd
9 Principles and Troubleshooting
Description
Data line
Clock
Control signal
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