PT7A6632J PERICOM [Pericom Semiconductor Corporation], PT7A6632J Datasheet - Page 9

• Manufacturer Part Number: PT7A6632J
• Description: PT7A6632 32-Channel HDLC Controller
• Manufacturer: PERICOM [Pericom Semiconductor Corporation]

Functional Description
General Description
The PT7A6632 HDLC Controller is applied between an exter-
nal memory and T1/E1 trunk interface to perform data trans-
mission and reception. See Figure 1. Its signal attributes are
shown in Figure 4.
PT7A6632 reads the data to be transmitted from the external
memory in 8-bit parallel way, formats them and adapts data
rate, then transmits the data to the T1/E1 trunk interface.
PT7A6632 receives serial data from the T1/E1 trunk interface,
PT019(05/02)
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Figure 4. PT7A6632 Interface Signals
Memory
External
CPU
16
8
ATTN
ATACK
SYSACC
INTR
A0-A15
D0-D7
READ
WRITE
AS
DMND
RESET
UAEN MDFS
PT7A6632
HCS0-HCS1 T1/CEPT SIS
Device Mode
PT7A6632 32-Channel HDLC Controller
9
deformats them and adapts data rate, then stores the data into
the external memory.
The channel operation modes are set up in the external memory
by CPU. PT7A6632 reads the commands from the external
memory and process data channel by channel, totally 64 chan-
nels (32 for transmission and 32 for receive). Each channel
mode can be set up in external memory independently by CPU.
PT7A6632 consists of 4 functional blocks as shown in Figure
2. There are:
2
•
•
•
•
Transmit Bit-Level Processor,
Receive Bit-Level Processor,
Memory Manager, and
State/Control Machine.
CH0-CH4
SYSCLK
TSEREN
RSYNC
TMAX
RRED
RCLK
TCLK
Rx/Tx
RSER
TSER
5
Interface
Channel
Output
T1/E1
Trunk
Status
Data Sheet
Ver:2