Document Number: 002-14813 Rev. *B

Page 7 of 47

CYW20715

1.3 Mobile Phone Usage Model

The CYW20715 is designed to provide a direct interface to new and existing handset designs, as shown in Figure 3. The device has

flexible PCM and UART interfaces, enabling it to transparently connect to existing circuits. In addition, the TCXO and external LPO

inputs allow the use of existing handset features, helping to minimize product size, power, and cost.

The device incorporates a number of unique features to accommodate integration into mobile phone platforms.

more external codec devices.

power operation.

supplied to the device can be disabled for added power saving during Sleep mode.

device or has been removed.

the state of operation, and has been fully characterized in the global cellular bands.

(distortion of the transmitted signal caused by mixing the cellular and Bluetooth transmissions) in the presence of a cellular trans-

mission (GSM, GPRS, CDMA, WCDMA, or iDEN). Minimal external filtering is required for integration within the handset.

Figure 3. Mobile Phone Usage Model

Voice Codec

Handset 

Baseband

TCXO

LPO Clock

CYW20715

802.11 WLAN

PCM

UART/SPI

BT_WAKE

HOST_WAKE

CLK_REQ

LPO_INPUT

(optional)

OPTIONAL/STATUS

BT_BUSY/TX_REQ

WIFI_BUSY/TX_CONFIRM

XTAL_IN

1.63V to 5.5V battery