Epson S1D13504 manual User-Programmable Machine UPM

Models: S1D13504

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Epson Research and Development

 

Vancouver Design Center

 

 

2.3.2 User-Programmable Machine (UPM)

The UPM is typically used to control memory types, such as Dynamic RAMs, which have complex control or address multiplexing requirements. The UPM is a general purpose RAM-based pattern generator which can control address multiplexing, wait state gener- ation, and five general-purpose output lines on the MPC821. Up to 64 pattern locations are available, each 32 bits wide. Separate patterns may be programmed for normal accesses, burst accesses, refresh (timer) events, and exception conditions. This flexibility allows almost any type of memory or peripheral device to be accommodated by the MPC821.

In this application note, the GPCM is used instead of the UPM, since the GPCM has enough flexibility to accommodate the S1D13504 and it is desirable to leave the UPM free to handle other interfacing duties, such as EDO DRAM.

S1D13504

Interfacing to the Motorola MPC821 Microprocessor

X19A-G-010-05

Issue Date: 01/02/02

Page 450
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Epson S1D13504 manual User-Programmable Machine UPM