User's Manual

apmcomm confidential
apm6658/6659 WiFi 802.11 b/g/n & BT2.1+EDR Dual Radio Module
Product Information Data Sheet
Page 14 of 30
apm Communication, Inc. – TEL: [phone] – FAX: [phone]
Website: http://www.apmcomm.com – E-mail:
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apmcomm Proprietary and Confidential – Product information is subject to change without notice.– May 30 2011
1-5-2 UART Pins
apm6658/6659 supports a Universal Asynchronous Receiver Transmitter (UART) interface with programmable
baud rate up to 4Mbps. BlueCore Serial Protocol (BCSP), a proprietary alternative to the standard Bluetooth UART
Host Transport, is also supported. If in UART mode, apm6658/6659 selects the UART transfer protocol automatically
using the unused SDIO pins show in below table.
UART Bus Name Pin #
Pin Name Description
CTS 10 BT_UART_CTS
UART clear to send active low
RTS 16 BT_UART_RTS
UART request to send active low
TX 14 BT_UART_TX
UART data output active high
RX 15 BT_UART_RX
UART data input active high
VDDIO 18 BT_VDD_PADS Serial I/O VDD
BT_SD_CLK BT_SD_CMD UART Protocol
0 0 BCSP
0 1 H4
1 0 H4DS
1 1 H5
1-5-3 PCM Pins
apm6658/6659 audio Pulse Code Modulation (PCM) interface supports continuous transmission and reception of
PCM encoded audio data over Bluetooth. The Digital Audio Interface (I2S) shares the same pins as the PCM interface.
Bus Name Pin # Pin Name Description
SYNC 56 BT_PCM_SYNC
PCM: PCM2 Synchronous data sync
I2S: I2S_WS
CLK 55 BT_PCM_CLK
PCM: PCM2 Synchronous data clock
I2S: I2S_SCK
OUT 2 BT_PCM_OUT
PCM: PCM2 Synchronous data output
I2S: I2S_OUT
IN 1 BT_PCM_IN
PCM: PCM2 Synchronous data input
I2S: I2S_IN
VDDIO 18 BT_VDD_PADS Serial I/O VDD
PCM2/I2S interface mapping