DESCRIPTION
This FLEXTM Roaming Decoder II date sheet describes the operation of the KS8701.
The KS8701 simplifies implementation of a FLEXTM paging device by interfacing with any of several off-theshelf paging receivers and any of several off-the-shelf host microcontroller/microprocessors. Its primary function is to process information received and demodulated from a FLEX radio paging channel, select messages addressed to the paging device and communicate the message information to the host.

FEATURES
• FLEXTM paging protocol decoder
• 16 programmable user address words
• 16 fixed temporary addresses
• 16 operator messaging addresses
• 1600,3200,and 6400bps(bits per second) decoding
• Any-phase or single-phase decoding
• Uses standard Serial Peripheral Interface (SPI) in slave mode
• Allow low current STOP mode operation of host processor
• Highly programmable receiver control
• Real time clock time base
• FLEX fragmentation and group messaging support
• Real time clock over-the-air update support
• Compatible with synthesized receivers
• SSID and NID Roaming support
• Low Battery Indication(External detector)
• 28 used pins (32-pin package standard)
• Backward compatible to the standard and roaming FLEX decoder ICs
• Internal demodulator and data slicer
• Improved battery savings via partial correlation and intermittent receiver clock
• Full support for revision 1.9 of the FLEX protocol
• 32-pin LQFP package