MK5027N ST Microelectronics, Inc., MK5027N Datasheet - Page 6

• Manufacturer Part Number: MK5027N
• Description: SS7 Signalling Link Controller
• Manufacturer: ST Microelectronics, Inc.

MK5027
Figure 3: MK5027 Simplified Block Diagram.
OPERATIONAL DECRIPTION
The SGS-THOMSON Signalling System #7 Sig-
nalling Link Controller (MK5027) device is a VLSI
product intended for data communication applica-
tions requiring SS7 link level control. The MK5027
will perform all frame formatting, such as: frame
delimiting with flags, FCS generation and detec-
tion. It will also perform all error recovery and link
control. The MK5027 also includes a buffer man-
agement mechanism that allow the user to trans-
mit and/or receive multiple MSU’s. Contained in
the buffer management is an on-chip dual chan-
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SYSCLK
RCLK
RD
CONTROLLER
DMA
RECEIVER
RECEIVER
FIFO
INTERNAL BUS
READY
READ
DAS
LOOPBACK
TEST
CONTROL / STATUS
REGISTERS 0 - 5
TRANSMITTER
TRANSMITTER
FIFO
nel DMA: one channel for receive and one chan-
nel for transmit. The MK5027 handles error recov-
ery and link status signalling.
The MK5027 is intended to be used with any
popular 16 or 8 bit microprocessor. Possible sys-
tem configuration for the MK5027 is shown in Fig-
ure 2. The MK5027 will move multiple blocks of
receive and transmit data directly into and out of
memory through the host’s bus. An I/O accelera-
tion processor in Figure 2 is recommended, but
not required.
VCC
VSS - GND
RESET
TCLK
TD
CONTROLLER
FIRMWARE
MICRO
ROM
TIMERS