pt7a6525 Pericom Technology Inc, pt7a6525 Datasheet - Page 31

• Manufacturer Part Number: pt7a6525
• Description: Pt7a6525/6525l/6526 Hdlc Controller
• Manufacturer: Pericom Technology Inc

|||||
The following figure shows the process of transmitting a 50-byte frame between a microprocessor and a serial interface of a
PT7A6525/6525L chip.
Concatenated frames:
Several frames can be transmitted in a high speed sequence without timefill. The closing flag will be immediately followed by an
opening flag. The receiver can even receive frames separated by only one (shared) flag. The following figure shows the process
of transmitting two concatenated frames (50 bytes and 13 bytes) to serial interface.
P T 0 0 1 7 ( 1 2 / 0 5 )
Figure 15. Transmission of a 50-byte Frame in Interrupt Mode
Figure 16. Concatenated Frame Transmission in Interrupt Mode (PT7A6525/6525L/6526)
processor
Micro-
processor
Micro-
XTF+ XME
(WR 32 Bytes)
XTF
XPR
(WR 18 Bytes)
XTF
XPR
XME
(WR 13 Bytes)
XTF
XPR
XPR
XPR or XFW
.
.
.
.
.
.
XTF
XPR or XFW
XTF+XME
XPR
(WR 32 Bytes)
(WR 18 Bytes)
PT7A6525/6525L/6526
31
PT7A6525/6525L/6526 HDLC Controller
PT7A6525/PT7A6526
ITF
32 bytes
18 bytes
13 bytes
ITF
TxD
32 bytes
18 bytes
Frame 1
Frame 2
Serial
Interface
Data Sheet
Ver:8