SCD1284 datasheet(5/176 Pages) INTEL

5 / 176 page

Datasheet

IEEE 1284-Compatible Parallel Interface Controller — CD1284

6.5.2

Hardware-Activated Service Examples ................................................102

6.6

Baud Rate Derivation ........................................................................................ 102

6.7

Baud Rate Tables.............................................................................................. 103

6.8

ASCII Code Tables............................................................................................ 106

6.8.1

Hexadecimal — Character ...................................................................106

6.8.2

Decimal — Character ........................................................................... 107

7.0

Detailed Register Descriptions.........................................................................108

7.1

Global Registers................................................................................................ 108

7.1.1

Channel Access Register ..................................................................... 108

7.1.2

Global Firmware Revision Code Register ............................................ 108

7.1.3

General-Purpose I/O Direction Register............................................... 109

7.1.4

General-Purpose I/O Register.............................................................. 109

7.1.5

Modem Interrupting Channel Register ................................................. 109

7.1.6

Modem Interrupt Register..................................................................... 110

7.1.7

Parallel Interrupt Register..................................................................... 111

7.1.8

Prescaler Period Register .................................................................... 111

7.1.9

Receive Interrupting Channel Register ................................................112

7.1.10 Receive Interrupt Register.................................................................... 112

7.1.11 Service Request Register..................................................................... 112

7.1.12 Transmit Interrupting Channel Register ............................................... 113

7.1.13 Transmit Interrupt Register...................................................................113

7.2

Virtual Registers ................................................................................................ 113

7.2.1

Modem Interrupt Status Register ......................................................... 114

7.2.2

Modem Interrupt Vector Register ......................................................... 114

7.2.3

Parallel Interrupt Vector Register ......................................................... 115

7.2.4

Receive Data/Status Registers ............................................................ 115

7.2.5

Receive Interrupt Vector Register ........................................................ 116

7.2.6

Transmit Data Register ........................................................................ 117

7.2.7

Transmit Interrupt Vector Register ....................................................... 117

7.2.8

End of Service Request Register ......................................................... 118

7.3

Channel Registers.............................................................................................118

7.3.1

Channel Command Register ................................................................ 118

7.3.2

Channel Control Status Register.......................................................... 122

7.4

Channel Registers — Parallel Pipeline .............................................................123

7.4.1

Channel Option Register 1 ...................................................................123

7.4.2

Channel Option Register 2 ...................................................................124

7.4.3

Channel Option Register 3 ...................................................................125

7.4.4

Channel Option Register 4 ...................................................................126

7.4.5

Channel Option Register 5 ...................................................................128

7.4.6

Local Interrupt Vector Register.............................................................128

7.4.7

LNext Character Register..................................................................... 129

7.5

Modem Change Option Registers ..................................................................... 129

7.5.1

Modem Change Option Register 1....................................................... 129

7.5.2

Modem Change Option Register 2....................................................... 130

7.5.3

Modem Signal Value Register 1 ........................................................... 130

7.5.4

Modem Signal Value Register 2 ........................................................... 131

7.5.5

Receive Baud Rate Period Register..................................................... 131

7.5.6

Receive Clock Option Register ............................................................ 131

7.5.7

Received Data Count Register .............................................................132

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