ST5451 Datasheet, PDF (1/34 Pages) STMicroelectronics – ISDN HDLC AND GCI CONTROLLER

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ST5451
ISDN HDLC AND GCI CONTROLLER
MONOLITHIC ISDN ORIENTED HDLC AND
GCI CONTROLLER.
GCI AND µW/DSI COMPATIBLE.
FULLY CONTROLLING GCI AND GCI-SCIT
M & C/I CHANNELS MANAGEMENT.
FULLY SUPPORTING LAPB AND LAPD PRO-
TOCOL ON B OR D CHANNEL.
EASILY INTERFACEABLE WITH ANY KIND
OF STANDARD NON MULTIPLEXED OR
MULTIPLEXED BUS MICROPROCESSOR.
DMA ACCESS WITH MULTIPLEXED BUS µP
CAN HANDLE AND STORE AT THE SAME
TIME TWO FRAMES IN TRANSMISSION
(64bytes FIFO Tx) AND EIGHT FRAMES IN
RECEPTION (64bytes FIFO Rx)
COMPATIBLE WITH ALL THE STMicroelec-
tronics ISDN PRODUCT FAMILY.
SO28
ORDERING NUMBER: ST5451D
GENERAL DESCRIPTION
ST5451 HDLC and GCI controller is a CMOS cir-
cuit fully developed by STMicroelectronics and
diffused in advanced 1.2 µm HCMOS3 technol-
ogy.
The device is intended to be used mainly in ISDN
applications, in Terminal (TE) and in Line Termi-
nations (LT).
ST5451 can handle HDLC packets either on
16Kbit/s D channel or 64 Kbit/s B channel; it can
work with a wide range of PCM signals go-
ing from GCI (General Circuit Interface) to DSI
(Digital System Interface) to any PCM-like
stream.
ST5451 is a complete GCI controller designed to
comply with the GCI and GCI-SCIT (Special Cir-
cuit Interface for Terminal) completely handling
Monitor (M) and Command/Indicate (C/I) chan-
nels.
ST5451 can be easily controlled by many differ-
ent kind of microprocessors or microcontrollers
having either non-multiplexed or multiplexed bus
structure.
ST5451 can be used in connection with ST5420/1
S Interface Devices (SID-µW and SID-GCI) and
ST5080 Programmable ISDN Combo (PIC) in
Terminals and with ST5410 U Interface Device
(UID) in Line Terminations.
PIN CONNECTION (Top view)
March 2000
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is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without