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Manual Number: 00650-004-5
Page 5-8
ADIO1600 Manual
Mode 0
This functional configuration provides simple input and output operations for each of the three
ports. No handshaking is required, data is simply written to or read from a specified port.
Mode 0 Basic Functional Definitions:
Two 8-bit ports and two 4-bit ports
Any port can be input or output
Outputs are latched
Inputs are not latched
16 different Input/Output combinations are possible in this mode
Mode 1
This functional configuration provides a means for transferring I/O data to or from a specified port
in conjunction with strobes or handshaking signals. In Mode 1, Port A and Port B use the lines
on Port C to generate or accept these handshaking signals.
Mode 1 Basic Functional Definitions
Two Groups (Group A and Group B)
Each group contains one 8-bit data port and one 4-bit control/data port
The 8-bit data port can be either input or output. Both inputs and outputs are latched
The 4-bit port is used for control and status of the 8-bit data port
Mode 2
This functional configuration provides a means for communicating with a peripheral device or
structure on a single 8-bit bus for both transmitting and receiving data (bi-directional bus I/O).
Handshaking signals are provided to maintain proper bus flow discipline in a similar manner to
MODE 1. Interrupt generation and enable/disable functions are also available.
Mode 2 Basic Functional Definitions
Used in Group A only
One 8-bit, bidirectional bus port (Port A) and a 5-bit control port (Port C)
Both inputs and outputs are latched
The 5-bit control port (Port C) is used for control and status for the 8-bit, bi-directional bus port
(Port A)
Содержание ADIO1600 Series
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