CD1865 datasheet(5/150 Pages) INTEL

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Datasheet

Intelligent Eight-Channel Communications Controller — CD1865

8.9

Transmitting Data ................................................................................................ 87

8.10

Receiving Data .................................................................................................... 88

8.11

Programming Examples ...................................................................................... 88

8.11.1 Programming the Service Match Registers ............................................88

8.11.2 CD1865 Initialization .............................................................................. 88

8.11.3 Basic I/O Operations .............................................................................. 90

8.11.4 Interrupt Response Operations .............................................................. 90

8.11.5 Polled Mode Operation........................................................................... 93

9.0

Detailed Register Descriptions...........................................................................94

9.1

9.2

Global Registers.................................................................................................. 97

9.2.1

Miscellaneous Registers ........................................................................ 98

9.2.2

Configuration Registers.......................................................................... 98

9.2.3

Service Request/Interrupt Control Registers ........................................ 103

9.3

Indexed Indirect Registers................................................................................. 108

9.3.1

Receive Data Count Register............................................................... 108

9.3.2

Receive Data Register ......................................................................... 109

9.3.3

Receive Character Status Register ...................................................... 110

9.3.4

Transmit Data Register ........................................................................ 111

9.3.5

End-of-Service Request Register......................................................... 111

9.4

Channel Registers.............................................................................................111

9.4.1

Enable Register................................................................................... 112

9.4.2

Channel Command Register ................................................................ 112

9.4.3

Channel Option Register 1 ...................................................................116

9.4.4

Channel Option Register 2 ...................................................................116

9.4.5

Channel Option Register 3 ...................................................................117

9.4.6

Channel Control Status Register.......................................................... 118

9.4.7

Receiver Bit Register............................................................................ 119

9.4.8

Receive Time-Out Period Register....................................................... 120

9.4.9

Receive Bit Rate Period Registers (High/Low)..................................... 120

9.4.10 Transmit Bit Rate Period Registers (High/Low).................................... 121

9.4.11 Special Character Register 1 ............................................................... 121

9.4.12 Special Character Register 2 ............................................................... 122

9.4.13 Special Character Register 3 ............................................................... 122

9.4.14 Special Character Register 4 ............................................................... 123

9.4.15 Modem Change Register ..................................................................... 123

9.4.16 Modem Change Option Register 1....................................................... 124

9.4.17 Modem Change Option Register 2....................................................... 125

9.4.18 Modem Signal Value Register.............................................................. 125

9.4.19 Modem Signal Value Request-to-Send Register.................................. 126

9.4.20 Modem Signal Value Data-Terminal-Ready Register .......................... 126

10.0

Electrical Specifications ....................................................................................127

10.1

Absolute Maximum Ratings............................................................................... 127

10.2

Recommended Operating Conditions ............................................................... 127

10.3

DC Electrical Characteristics............................................................................. 127

10.4

Index of Timing Information............................................................................... 128

10.5

AC Electrical Characteristics ............................................................................. 128

10.5.1 Clocked Bus Interface ..........................................................................128

CD1865 Datasheet(PDF) 5 Page - Intel Corporation

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