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SA-1110 Developer’s Manual 13
11.12.1.6Alternate SSP Pin Assignment..................................................................... 348
11.12.1.7CPU and DMA Register Access Sizes ......................................................... 348
11.12.2 MCP Register Definitions .............................................................................................349
11.12.3 MCP Control Register 0................................................................................................349
11.12.3.1Audio Sample Rate Divisor (ASD)................................................................ 349
11.12.3.2Telecom Sample Rate Divisor (TSD) ........................................................... 350
11.12.3.3Multimedia Communications Port Enable (MCE) ......................................... 351
11.12.3.4External Clock Select (ECS)......................................................................... 351
11.12.3.5A/D Sampling Mode (ADM) .......................................................................... 352
11.12.3.6Telecom Transmit FIFO Interrupt Enable (TTE)........................................... 352
11.12.3.7Telecom Receive FIFO Interrupt Enable (TRE) ........................................... 352
11.12.3.8Audio Transmit FIFO Interrupt Enable (ATE) ............................................... 352
11.12.3.9Audio Receive FIFO Interrupt Enable (ARE)................................................ 353
11.12.3.10Loopback Mode (LBM) ............................................................................... 353
11.12.3.11External Clock Prescaler (ECP) ................................................................. 353
11.12.4 MCP Control Register 1................................................................................................355
11.12.4.1Clock Frequency Select (CFS)..................................................................... 355
11.12.5 MCP Data Registers.....................................................................................................356
11.12.5.1MCP Data Register 0.................................................................................... 356
11.12.5.2MCP Data Register 1.................................................................................... 357
11.12.5.3MCP Data Register 2.................................................................................... 358
11.12.6 MCP Status Register....................................................................................................360
11.12.6.1Audio Transmit FIFO Service Request Flag (ATS)
(read-only, maskable interrupt) ..................................................................... 360
11.12.6.2Audio Receive FIFO Service Request Flag (ARS)
(read-only, maskable interrupt) ..................................................................... 360
11.12.6.3Telecom Transmit FIFO Service Request Flag (TTS)
(read-only, maskable interrupt) ..................................................................... 361
11.12.6.4Telecom Receive FIFO Service Request Flag (TRS)
(read-only, maskable interrupt) ..................................................................... 361
11.12.6.5Audio Transmit FIFO Underrun Status (ATU)
(read/write, nonmaskable interrupt) .............................................................. 361
11.12.6.6Audio Receive FIFO Overrun Status (ARO)
(read/write, nonmaskable interrupt) .............................................................. 361
11.12.6.7Telecom Transmit FIFO Underrun Status (TTU)
(read/write, nonmaskable interrupt) .............................................................. 362
11.12.6.8Telecom Receive FIFO Overrun Status (TRO)
(read/write, nonmaskable interrupt) .............................................................. 362
11.12.6.9Audio Transmit FIFO Not Full Flag (ANF) (read-only, noninterruptible) ....... 362
11.12.6.10Audio Receive FIFO Not Empty Flag (ANE) (read-only, noninterruptible) . 362
11.12.6.11Telecom Transmit FIFO Not Full Flag (TNF) (read-only, noninterruptible). 362
11.12.6.12Telecom Receive FIFO Not Empty Flag (TNE)
(read-only, noninterruptible).......................................................................... 362
11.12.6.13Codec Write Completed Flag (CWC) (read-only, noninterruptible) ............ 363
11.12.6.14Codec Read Completed Flag (CRC) (read-only, noninterruptible)............. 363
11.12.6.15Audio Codec Enabled Flag (ACE) (read-only, noninterruptible)................. 363
11.12.6.16Telecom Codec Enabled Flag (TCE) (read-only, noninterruptible) ............ 363
11.12.7 SSP Operation..............................................................................................................365