CC2540 与 ANDROID手机反复提示配对的问题

Hi,

设置如下，ANDROID手机搜索到设备后提示配对，点击确认配对，然后过几秒就断开连接了，然后又连接上，再提示配对，反复这样，请问是什么问题呢？谢谢！

uint32 passkey = 000000;
uint8 pairMode = GAPBOND_PAIRING_MODE_INITIATE;
uint8 mitm = TRUE;
uint8 ioCap = GAPBOND_IO_CAP_NO_INPUT_NO_OUTPUT;
uint8 bonding = TRUE;
GAPBondMgr_SetParameter( GAPBOND_DEFAULT_PASSCODE, sizeof( uint32 ), &passkey );
GAPBondMgr_SetParameter( GAPBOND_PAIRING_MODE, sizeof( uint8 ), &pairMode );
GAPBondMgr_SetParameter( GAPBOND_MITM_PROTECTION, sizeof( uint8 ), &mitm );
GAPBondMgr_SetParameter( GAPBOND_IO_CAPABILITIES, sizeof( uint8 ), &ioCap );
GAPBondMgr_SetParameter( GAPBOND_BONDING_ENABLED, sizeof( uint8 ), &bonding );