Preliminary
14-40
SiW3500
60 0066 R00Hrf SiW3500 Radio Processor DS
•
Configuration of the CODEC interface is done by the firmware during boot-up by reading non-volatile memory (NVM)
parameters.
Multi-function I/Os (MFPs)
Up to 8 (eight) multi-function I/O ports are available in the SiW3500. The table below identifies the I/Os and their usage.
External Memory Interface
The SiW3500 does not require additional memory for standard below HCI protocol functions. An external memory
interface is available for execution of protocol stack software from FLASH memory if desired. If external FLASH memory
will be used, the read access time of the device must be 100 ns or less.
Auxiliary UART
The SiW3500 can be configured and enabled with an auxiliary UART port. This UART port can be used for debug
depending on the application software.
External Power Amplifier Interface
The SiW3500 supports the use of an external power amplifier for +20 dBm designs. When enabled, these signals
provide an integrated interface for the control of an external PA.
Power Management
The HOST_WAKEUP and EXT_WAKE signals are used for power management control of the SiW3500.
HOST_WAKEUP is an output signal used to indicate Bluetooth activity to the host. EXT_WAKE is an input signal used
by the host to wake up the SiW3500 from sleep mode.
For control of the reference clock source, CLOCK_REQ_IN and CLOCK_REQ_OUT can be made available to turn on/off
an external reference clock source.
General-Purpose Analog to Digital Converter (ADC)
The SiW3500 incorporates a general-purpose ADC that can be enabled to sample external analog voltage. The ADC
has an 8-bit resolution.
External EEPROM Controller and Interface
This interface is intended for communication to an optional EEPROM when using the SiW3500 in ROM mode. The
Multi Function I/O Number
Possible Usage Configuration
MFP[0]
General purpose.
MFP[1]
CLOCK_REQ_IN, HOST_WAKEUP, General purpose.
MFP[2]
Address A[18], SYNC_CLOCK, AUX_RTS, General purpose.
MFP[3]
FREQ_SEL[3], SYNC_DATA, General purpose.
MFP[4]
FREQ_SEL[1], General purpose.
MFP[5]
FREQ_SEL[2], General purpose.
MFP[6]
AUX_RXD, General purpose.
MFP[7]
AUX_CTS, TX_RX_SWITCH, General purpose.
Signal
Description
AUX_TXD
TX Data
AUX_RXD
RX Data
AUX_CTS
Clear To Send
AUX_RTS
Request To Send
Signal
Description
IDAC
Power control to external PA. This output provides a variable current source
that can be used to control the external PA. Leave unconnected if not used
TX_RX_SWITCH
Output signal used to indicate the state of the radio. This could be used as a
direction control for the PA. The polarity is programmable with the default set
as: Low = Transmit; High = Receive.
Japanese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
