Specifications

Preface
Chapter 9, "DMA Controller (V40)," describes the function,
configuration, and operation of the V40 Direct Memory Access
Control Unit, a programmable peripheral device used to direct high
speed data transfers between the ZT 8832 and SBX expansion module
I/O. The chapter also includes register descriptions.
Chapter 10, "Serial Communications (V40)," describes the func-
tion, configuration, and operation of the V40 Serial Control Unit, a
single serial channel that performs asynchronous serial
communication between the V40 and a serial device external to the
ZT 8832. The chapter also includes register descriptions.
Chapter 11, "Serial Communications (82050)," describes the
function, configuration, and operation of the serial controller external
to the V40. This is the Intel 82050 Asynchronous Communications
Controller, or equivalent. The chapter also includes register
descriptions.
Chapter 12, "Parallel I/O," describes the function, configuration,
and operation of the ZT 8832 parallel I/O. Parallel I/O is used to
control industry standard I/O modules, such as those manufactured by
Opto 22, Gordos, Crydom, and Adtek. The on-board programmable
LEDs are also controlled through parallel I/O.
Chapter 13, "Watchdog Timer," describes the function, con-
figuration, and operation of the ZT 8832 two-stage watchdog timer,
which is used to monitor ZT 8832 operation and take corrective action
if the ZT 8832 fails to function as programmed.
Chapter 14, "SBX Expansion Module," contains a description and
installation information for the optional SBX expansion module,
which can be used to expand the I/O capabilities of the ZT 8832.