HD64570 Datasheet, PDF (7/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

How to Use This Manual
This user's manual describes the functions, performance, and usage of the HD64570 serial
communications adaptor (SCA) as a general-purpose communications control chip.
This manual consists of eleven chapters and an appendix.
— Section 1 Overview
This section outlines the functions, performance, and internal structure of the SCA.
— Section 2 Pin Arrangements and Functions
This section shows the pin arrangements and lists the functions of each pin.
— Section 3 System Controller
This section describes the operating modes of the chip (reset mode, normal operating mode,
system stop mode), the bus arbiter functions, and the bus interface needed for interfacing with
a host MPU.
— Section 4 Interrupt Controller
This section describes the SCA's interrupt control logic, on-chip interrupt sources, vector
output (fixed and modified vectoring), and acknowledge cycle.
— Section 5 MSCI (Multiprotocol Serial Communication Interface)
This section gives a general description of the asynchronous, byte-synchronous, and bit-
synchronous communication protocols supported by the built-in multiprotocol serial
communication interfaces (MSCI channels 0 and 1) that implement the main functions of the
SCA, and shows the register settings for various communication functions.
— Section 6 DMAC (DMA Controller)
This section explains the single- and chained-block transfer modes supported by the built-in
direct memory access controller (DMAC channels 0 to 3). Internal register functions and
settings are also described.
— Section 7 Timers
This section explains operating modes and register settings of the built-in timers (channels
0 to 3), which generate internal interrupts.
— Section 8 Wait Controller
This section describes the built-in wait controller, which inserts wait states during memory
access to one of three physical address spaces. Details about the associated internal registers
and WAIT pin are also provided.
Rev. 0, 07/98, page iii of 11