MC68HC08AZ0 Datasheet, PDF (39/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
EBI
EBI
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Module I/O signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Externally controlled WAIT states . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
EBI control registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Introduction
This section describes the External Bus Interface Module (EBI)
specification for the HC08AZ0 MCU. This module handles the transfer
of information between the MCU and the external address space. The
external bus provides up to 16 address lines, 8 data lines, 2 chip-selects
and 3 control signals to the external devices.
Features
1-ebi
MOTOROLA
• Up to 64K byte of Address Space.
• Low Noise or High Performance Modes of operation.
• 2 Pre-determined Chip-Select Lines (CS1 and CS0).
• Separate Read and Write Enable Signals
• 0,1,2 or 3 WAIT States for Slow Memory Access associated with
CS1
• Up to 7 WAIT States for Slow Device Access associated with CS0.
EBI
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MC68HC08AZ0
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