HD64570 Datasheet, PDF (11/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

Contents
Section 1 Overview ........................................................................................................... 1
1.1 Overview............................................................................................................................ 1
1.2 Features.............................................................................................................................. 1
1.3 Basic Functions.................................................................................................................. 2
1.4 Block Diagram................................................................................................................... 4
1.5 Protocol Support................................................................................................................ 8
1.5.1 Asynchronous Mode ............................................................................................ 8
1.5.2 Byte-Synchronous Mode...................................................................................... 9
1.5.3 Bit-Synchronous Mode ........................................................................................ 9
1.6 Built-In Registers............................................................................................................... 10
1.6.1 Low-Power Mode Control Registers.................................................................... 10
1.6.2 Interrupt Control Registers ................................................................................... 10
1.6.3 MSCI Registers .................................................................................................... 11
1.6.4 DMAC Registers common to channels 0 to 3...................................................... 12
1.6.5 DMA Registers provided separately for channels 0 to 3...................................... 13
1.6.6 Timer Registers .................................................................................................... 15
1.6.7 Wait Controller Registers ..................................................................................... 15
1.7 General Description of Functions...................................................................................... 16
1.7.1 Operating Modes of Serial Section ...................................................................... 16
1.7.2 Transmission Formats .......................................................................................... 16
1.7.3 Transmission Error Detection .............................................................................. 18
1.7.4 Transmission Codes.............................................................................................. 19
1.7.5 Transmit/Receive Clock Selection ....................................................................... 20
1.7.6 Maximum Bit Rates.............................................................................................. 22
1.7.7 Transmitter ........................................................................................................... 23
1.7.8 Receiver................................................................................................................ 24
1.7.9 DMAC.................................................................................................................. 26
1.7.10 DMA Buffer Chaining.......................................................................................... 33
1.7.11 Descriptor Structure.............................................................................................. 34
1.7.12 Bus Arbiter ........................................................................................................... 35
1.7.13 Interrupt Control................................................................................................... 36
1.7.14 Timers................................................................................................................... 40
1.7.15 Wait Controller..................................................................................................... 40
Section 2 Pin Arrangements and Functions ............................................................... 41
2.1 Pin Arrangements .............................................................................................................. 41
2.2 Pin Functions ..................................................................................................................... 43
Rev. 0, 07/98, page i of 11