WS9623AB3DF

Datasheet (V1.2)

Copyright © Vimicro_wx, Inc. 1999-2014

11

RF Interface

Port RFXP and AVDD_RF are the RF I/O ports and need to be bonded out. The two RF pins are connected to

on-board matching network which should be placed close to the chip. The associated on

–board transmission line

routing should have 50

Ω impedance matching.

Audio Interface

WS9623AB3DF supports Dual Microphone Audio inputs. The MICLP port is microphone left channel inputs, the

MICLN port is differential inputs, the MICRP port is microphone right channel inputs and the MICRN port is

differential inputs.

The stereo Audio output ports are HPOUT_RP/HPOUT_RN and HPOUT_LP/HPOUT_LN, while HPOUT_RP and

HPOUT_RN are headphone right channel output, HPOUT_LP and HPOUT_LN are headphone left channel output.

UART Interface

The UART ports are shared with GIPO [4:1]. Those ports are used as UART by configuring related register by SW.

Function Description

Serial Operation

The UART module has one operation mode --- non-return to zero (NRZ).

The NRZ mode is primarily associated with RS-232. Each character is transmitted as a frame delimited by a start

bit at the beginning and a stop bit at the end. Data bits are transmitted least significant bit first, each bit occupies a

period of time equal to 1 full bit. If parity is used, then the parity bit is transmitted after the most significant bit.

Following is the waveform in NRZ mode.

Figure 5 Waveform of UART

UART External Connection for Bluetooth

The UART in WS9625ABMC can be used to transport HCI (Host Controller Interface) packets for Bluetooth. The

HCI UART Transport Layer uses the following settings for RS232:

[Table 3] HCI UART Transport Layer settings

Baud rate

manufacturer-specific

Number of data bits

8

Parity bit

no parity

Stop bit

1 stop bit

Flow control

RTS/CTS (Hardware Flow Control)

Flow-off response time

manufacturer specific

The RS232 signals should be connected in a null-modem fashion.

The most expensive null modem cable is the null modem cable suitable for full handshaking. In this null modem

NRZ mode transmits an

ASCII “A” Character with Odd

parity