TLV5591
SEMICONDUCTOR SIGNAL PROCESSOR
SLWS024– AUGUST 1995
DW PACKAGE
(TOP VIEW)
FLEX Paging Protocol Signal Processor
FLEX Roaming, Fragmentation, and Group
Messaging Support
NC
NC
V
1
28
27
FLEX Time-of-Day Stamping Support
V
2
DD
SS
16 Address Words support any
Combination of Long (2 Word) and Short
(1 Word) Addresses
RST
3
26 XTAL
LO BAT
EXTS0
EXTS1
S0
4
25 EXTAL
5
24
23
22
21
20
19
18
17
16
15
CLKOUT
SS
16 Temporary Address Words Support
Group Messaging
6
7
SCK
S1
8
SDI
1600, 3200, and 6400 Bits per Second
Decoding
S2
9
SDO
I/O RDY
ATTN
NC
10
11
12
13
14
S3
Any Phase (1, 2, and 4) Decoding
S4
Serial Peripheral Interface Security Circuit
Deters Unauthorized Reconfigurations
S5
V
V
SS
DD
2.0 Volt to 3.3 Volt Operation
NC
NC
Allows Low Current STOP Mode Operation
of Host Processor
Uses standard Serial Peripheral Interface
(SPI) in Slave Mode
32-bit Packets for Bidirectional
Communications over the Serial Peripheral
Interface
Universal Receiver Control Supports many
RF Integrated Circuits
Programmable Low Battery Monitoring
description
The TLV5591 signal processor is a FLEX signal processor that takes full advantage of the Motorola 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
sixprogrammabledataoutputlines. Warm-upcontrolallowstestingofbatterycondition, settingoutputlinestate,
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.
FLEX and Motorola are trademarks of Motorola, Inc.
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.
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