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Contents-4
8.2.12. Clock Select Register (CSR) ...........................................................................................8-20
8.3. Interrupts during Buffered Operation .....................................................................................8-21
8.3.1. Receive Interrupts .............................................................................................................8-21
8.3.2. Transmit Interrupts............................................................................................................8-23
8.4. Polled Operation.....................................................................................................................8-24
8.5. DMA Transfer Requests.........................................................................................................8-24
8.5.1. TXRDY.............................................................................................................................8-24
8.5.2. RXRDY.............................................................................................................................8-25
Chapter 9
Serial Communications Interface (SCI)
9.1. Overview ..................................................................................................................................9-2
9.1.1. Block Diagram ....................................................................................................................9-3
9.1.2. Pins......................................................................................................................................9-4
9.1.3. Control Registers.................................................................................................................9-4
9.2. Detailed Control Register Descriptions ....................................................................................9-5
9.2.1. SCI Transmit Control Register (STCON) ...........................................................................9-5
9.2.2. SCI Receive Control Register (SRCON) ............................................................................9-6
9.2.3. SCI Status Register (SCIST) ...............................................................................................9-7
9.2.4. SCI Buffer Register (SBUF) ...............................................................................................9-8
9.2.5. SCI Shift Registers ..............................................................................................................9-8
9.2.6. SCI Timer Counter (STMC) ...............................................................................................9-8
9.2.7. SCI Timer Register (STMR) ...............................................................................................9-9
9.2.8. SCI Timer Control Register (STMCON) ............................................................................9-9
9.3. Asynchronous (ASI) Operation ..............................................................................................9-10
9.3.1. Calculating Baud Rate.......................................................................................................9-10
9.3.2. Frame Formats ..................................................................................................................9-11
9.3.3. Transmitting Data..............................................................................................................9-12
9.3.4. Receiving Data ..................................................................................................................9-13
9.4. Clock Synchronous (CSI) Operation ......................................................................................9-14
9.4.1. Frame Formats ..................................................................................................................9-14
9.4.2. Transmitting Data..............................................................................................................9-14
9.4.2.1. Transmitting as Master ...............................................................................................9-15
9.4.2.2. Transmitting as Slave..................................................................................................9-16
9.4.3. Receiving Data ..................................................................................................................9-17
9.4.3.1. Receiving as Master....................................................................................................9-17
9.4.3.2. Receiving as Slave ......................................................................................................9-18
Chapter 10 Direct Memory Access Controller (DMAC)
10.1. Overview ..............................................................................................................................10-2
10.1.1. Block Diagram ................................................................................................................10-2
10.1.2. Pins..................................................................................................................................10-4
10.1.3. Control Registers.............................................................................................................10-5
10.2. Detailed Control Register Descriptions ................................................................................10-6
10.2.1. DMA Source Address Register 0 (DSAL0 and DSAH0)................................................10-6
10.2.2. DMA Destination Address Register 0 (DDAL0 and DDAH0) .......................................10-6
10.2.3. DMA Transfer Count Register 0 (DTC0) .......................................................................10-6
10.2.4. DMA Transfer Request Select Register 0 (DTRS0) .......................................................10-7
10.2.5. DMA Channel Mode Register 0 (DCM0) .......................................................................10-8
10.2.6. DMA Source Address Register 1 (DSAL1 and DSAH1)..............................................10-10
10.2.7. DMA Destination Address Register 1 (DDAL1 and DDAH1) .....................................10-10
10.2.8. DMA Transfer Count Register 1 (DTC1) .....................................................................10-10
10.2.9. DMA Transfer Request Select Register 1 (DTRS1) .....................................................10-11
10.2.10. DMA Channel Mode Register 1 (DCM1) ...................................................................10-12