mc68hc05pv8a Freescale Semiconductor, Inc, mc68hc05pv8a Datasheet - Page 169

• Manufacturer Part Number: mc68hc05pv8a
• Description: Mc68hc05pv8a Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

15.1 Contents
15.2 Introduction
15.3 Description
MC68HC(8)05PV8/A — Rev. 1.9
Technical Data — MC68HC(8)05PV8/A
15.2
15.3
15.3.1
The MC68HC(8)05PV8/A includes a fast parallel interface to access
external peripheral components as fast as internal ones. The external
address space ranges from $0030 to $003F and all 68HC05 instructions
can be applied to this memory. Since the data path is only 4-bits wide
either the lines PA7–PA4 or the corresponding data bits in the port A
data register are read depending on the state of the DDRA7–DDRA4
bits.
If this interface is enabled by setting the FPIE bit in the system control
register PA0–3 and PB0–3 lines provide a 4 bit address, multiplexed with
4 bit wide data and timing control lines.
The interface uses the lower port A lines (PA0–3) to provide a 4 bit
address multiplexed with 4 bit wide data. The timing is controlled by port
B lines.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
System Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . 171
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Fast Parallel Interface
Section 15. Fast Parallel Interface
Technical Data