PT7A6632 Datasheet, PDF (3/61 Pages) Pericom Semiconductor Corporation – PT7A6632 32-Channel HDLC Controller

Data Sheet
PT7A6632 32-Channel HDLC Controller
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External Memory Organization and Definition ......................................................................................... 20
General Structure ............................................................................................................................. 20
Activation Memory .......................................................................................................................... 21
Channel Activation Byte ........................................................................................................ 21
Channel Buffer Pointers ......................................................................................................... 21
Data Processing Memory ................................................................................................................. 24
General ................................................................................................................................... 24
Transmit Data Buffer .............................................................................................................. 24
Transmit Command Buffer ..................................................................................................... 26
Minimum Number of Data Bytes in a Tx Buffer.................................................................... 30
Receive Data Buffer ............................................................................................................... 31
Receive Command Buffer ...................................................................................................... 33
Minimum Buffer Size ............................................................................................................. 37
Device Operation ...................................................................................................................................... 38
Device Initialization ......................................................................................................................... 38
Channel Initialization ....................................................................................................................... 38
Data Transmission and Reception Operation ................................................................................... 39
Channel Period ................................................................................................................................ 41
Memory Address ............................................................................................................................. 42
Memory Address Extension ................................................................................................... 42
Activation Memory Address................................................................................................... 42
Memory Address Restrictions................................................................................................. 43
Interrupt Indication .......................................................................................................................... 43
Detailed Specifications .............................................................................................................................. 48
Absolute Maximum Ratings ............................................................................................................ 48
Recommended Operating Conditions .............................................................................................. 48
DC Electrical, Power Supply and Capacitance Characteristics ........................................................ 49
AC Characteristics ........................................................................................................................... 50
Serial Interface........................................................................................................................ 50
External Memory Interface ..................................................................................................... 54
Channel Activation/Deactivation ............................................................................................ 56
Input Characteristics ............................................................................................................... 57
Output Characteristics ............................................................................................................ 58
Mechanical Specifications ............................................................................................................... 59
Ordering Information ................................................................................................................................ 60
Notes ......................................................................................................................................................... 61
PT019(05/02)
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