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9.1 Overview ...........................................................................................................................................9-1
9.2 Features ............................................................................................................................................9-1
9.3 IOM2 Bus...........................................................................................................................................9-2
9.3.1 B Channels.............................................................................................................................9-3
9.3.2 D Channel ..............................................................................................................................9-3
9.3.3 Monitor Channels....................................................................................................................9-3
9.3.4 Command and Indicate Channels ...........................................................................................9-3
9.3.5 Intercommunication Channels.................................................................................................9-3
9.3.6 TIC Bus ..................................................................................................................................9-3
9.3.7 Channel Operation..................................................................................................................9-4
9.4 TSA (Time Slot Assigner) ..................................................................................................................9-9
9.4.1 Overview ................................................................................................................................9-9
9.4.2 TSA Block Diagram ................................................................................................................9-9
9.4.3 HDLC External Pin Multiplexed Signals ..................................................................................9-10
9.4.4 Operation ...............................................................................................................................9-10
9.5 IOM2 Special Registers .....................................................................................................................9-11
9.5.1 IOM2CON Register.................................................................................................................9-12
9.5.2 IOM2 Status Register .............................................................................................................9-14
9.5.3 IOM2 Interrupt Enable Register ..............................................................................................9-16
9.5.4 IOM2 TIC Bus Address Register .............................................................................................9-18
9.5.5 IOM2 IC Channel Transmit Data Register...............................................................................9-19
9.5.6 IOM2 C/I0 Channel Transmit Data Register ............................................................................9-20
9.5.7 IOM2 C/I1 Channel Transmit Data Register ............................................................................9-21
9.5.8 IOM2 C/I1 Channel Receive Data Register.............................................................................9-21
9.5.9 IOM2 Monitor Channel Transmit Data Register.......................................................................9-22
9.5.10 IOM2 Monitor Channel Receive Data Register......................................................................9-22
9.5.11 TSA A Control Register.........................................................................................................9-23
9.5.12 TSA B Control Register.........................................................................................................9-24
9.5.13 TSA C Control Register ........................................................................................................9-25
9.5.14 IOM2STRB (Strobe Register) ...............................................................................................9-26
S3C2500B RISC MICROCONTROLLER
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