EM77950 datasheet(11/102 Pages) EMC

11 / 102 page

EM77950

BB Controller

Product Specification (V1.0) 10.09.2007

• 3

(This specification is subject to change without further notice)

•

Base Band (BB) function interrupts:

CSD: carrier sense detection

TX_AE: TX_FIFO almost full

RX_AF: RX_FIFO almost full

TX_ EMPTY: finish a transmitting a package

RX_OF: RX_FIFO overflow

LINK_DIS: zero counter capacitor discharge mechanism

LOCK_OUT: finish receiving a package

LOCK_IN: start receiving a package

2.6 Baseband (BB)

Serial to Parallel conversion of RFW102 interface

Parallel interface to RFW102 modem

Serial to Parallel conversion of RFW102 interface

Input FIFO (RX_FIFO)

Output FIFO (TX_FIFO)

Preamble Correlation

Packet Address Filter (Network and unique)

CRC calculation

Inter-RFWAVES networks Carrier-sense

Discharge of RFW-102 reference capacitor

Compensate for clock drifts between the transmitting EM77950 and the receiving

EM77950 up to 1000ppm. Hence, the EM77950 requires low performance crystal.

Interrupt Driver – connected to the EM77950’s internal interrupt and informs the

EM77950 about BB events.

2.7 Serial Peripheral Interface (SPI)

Either MSB or LBS can be transmitted/received first

Both Master and Slave modes available

2.8 Pulse Width Modulation (PWM)

Dual Pulse Width Modulation (PWM) with 16-bit resolution

2.9 Analog to Digital Converter (ADC)

16 multi-channel Analog to Digital Converter with 8-bit resolution

EM77950 Datasheet(PDF) 11 Page - ELAN Microelectronics Corp