TS68230 datasheet(4/61 Pages) STMICROELECTRONICS

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Table 1.1 : Port Mode Control Summary.

Mode 0 (unidirectional 8-bit mode)

Port A

Submode 00 - Pin-definable Double-buffered Input or Single-buffered Output

H1 - Latches Input Data

H2 - Status/interrupt Generating Input, General-purpose Output, or Operation with H1 in the Interlocked or

Pulsed Handshake Protocols

Submode 01 - Pin-definable Double-buffered Output or Non-latched Input

H1 - Indicates Data Received by Peripheral

H2 - Status/interrupt Generating Input, General-purpose Output, or Operation with H1 in the Interlocked or

Pulsed Handshake Protocols

Submode 1X - Pin-definable Single-buffered Output or non-latched Input

H1 - Status/interrupt Generating Input

H2 - Status/interrupt Generating Input or General-purpose Output

Port B

H3 and H4 - Identical to Port A, H1 and H2

Mode 1 (unidirectional 16-bit mode)

Port A - Most-significant Data Byte or non-latched Input or Single-buffered Output

Submode XX - (not used)

H1 - Status/interrupt Generating Input

H2 - Status/interrupt Generating Input or General-purpose Output

Port B - Least-significant Data Byte

Submode X0 - Pin-definable Double-buffered Input or Single-buffered Output

H3 - Latches Input Data

H4 - Status/interrupt Generating Input, General-purpose Output, or Operation with H3 in the Interlocked or

pulsed handshake Protocols

Submode X1 - Pin-definable Double-buffered Output or Non-latched Input

H3 - Indicates Data Received by Peripheral

H4 - Status/interrupt Generating Input, General-purpose Output, or Operation with H3 in the Interlocked or

Pulsed Hanshake Protocols

Mode 2 (bidirectional 8-bit mode)

Port A - Bit I/O

Submode XX - (not used)

Port B - Double-buffered Bidirectional Data

Submode XX - (not used)

H1 - Indicates Output Data Received by the Peripheral and Controls Output Drivers

H2 - Operation with H1 in the Interlocked or Pulsed Output Handshake Protocols

H3 - Latches Input Data

H4 - Operation with H3 in the Interlocked or Pulsed Input Handshake Protocols

Mode 3 (bidirectional 16-bit mode)

Port A - Double-buffered Bidirectional Data (most-signifiant data byte)

Submode XX - (not used)

Port B - Double-buffered Bidirectional Data (least-signifiant data byte)

Submode XX - (not used)

H1 - Indicates Output Data Received by the Peripheral and Controls Output Drivers

H2 - Operation with H1 in the Interlocked or Pulsed Output Handshake Protocols

H3 - Latches Input Data

H4 - Operation with H3 in the Interlocked or Pulsed Input Handshake Protocols

TS68230

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