Zilog EZ80F91 Manual de usuario descargar pdf (Pagina 34)

eZ80F91 Development Kit

User Manual

UM014220-0508 eZ80 Development Kit

address decoder, implemented in the Generic Array Logic device,

GAL22LV10D (U10).

On-Chip SRAM

The eZ80F91 device on the eZ80F91 Module contains 8 KB of on-chip

SRAM. Upon power-up, this SRAM is enabled and mapped to address

FFC000h. Using the RAM Address Register, this 8 KB memory can be

mapped to the top of any 64 KB block. It can also be disabled. Refer to

eZ80F91 MCU Product Specification (PS0192) for more information.

Flash Memory

The eZ80F91 Development Kit allows off-chip Flash memories between

1 MB and 4 MB. This Flash memory is entirely located on the eZ80F91

Module (as footprint only; as shipped from the factory, external Flash is

not installed).

Memory Map

A memory map of the eZ80Acclaim!

Development Kit and the eZ80F91

Module is displayed in

Figure 10

. Flash memory and SRAM on the

eZ80F91 Module are addressed when

CS0

and

CS1

are active Low.

SRAM on the

eZ80Acclaim! Development Kit

is addressed when

CS2

active Low.

Refer to

eZ80F91 MCU Product Specification (PS0192)

for more details

about controlling on-chip Flash memory and SRAM.

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Zilog EZ80F91 Manual de usuario Pagina 34