TLV5591

SEMICONDUCTOR SIGNAL PROCESSOR

SLWS024– AUGUST 1995

1

POST OFFICE BOX 655303

POST OFFICE BOX 1443

Messaging Support

Combination of Long (2 Word) and Short

(1 Word) Addresses

Group Messaging

Decoding

Deters Unauthorized Reconfigurations

of Host Processor

(SPI) in Slave Mode

Communications over the Serial Peripheral

Interface

RF Integrated Circuits

description

The TLV5591 signal processor is a FLEX

t signal processor that takes full advantage of the MotorolaR FLEX

paging protocol. This low-current device operates at synchronous data rates of 1600, 3200, and 6400 bits per

second (bps) using a 76.8 kHz oscillator. This device is readily integrated with standard off-the-shelf electronic

pager components thereby reducing start-up costs associated with pager manufacturing. An industry standard

serial peripheral interface (SPI) transports simultaneous bidirectional 32-bit data packets between the TLV5591

and the host processor.

As a FLEX protocol decoder, the internal TLV5591 receiver control component makes use of 6-stage warm-up,

2-stage locking, and 3-stage warm-down sequences. This control information is passed to the receiver using

six programmable data output lines. Warm-up control allows testing of battery condition, setting output line state,

RF receiver power-on time, and other elements of a pager. The 2-stage locking sequence handles requirements

associated with received FLEX signal baud rate changes. The warm-down control sets the program selectable

time period when signal processing is complete, and the receiver can power-off. Battery condition can be

checked, and the output line state can be changed under warm down control.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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28

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NC

RST

LO BAT

EXTS0

EXTS1

S0

S1

S2

S3

S4

S5

NC

NC

XTAL

EXTAL

CLKOUT

SS

SCK

SDI

SDO

I/O RDY

ATTN

NC

NC

DW PACKAGE

(TOP VIEW)

Copyright

© 1995, Texas Instruments Incorporated

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.

Copyright

© 1995, Texas Instruments Incorporated