Ez80 ® Development Platform Memory - ZiLOG eZ80F92 User Manual

eZ80F92 Development Kit
User Manual
30
eZ80
Operational Description
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Components P4, T1, C3, C4, and U11 provide the phone line interface to
the modem. On the eZ80
D4 function as status indicators for this optional modem.
The phone line connection for the modem is for the United States only.
Connecting the modem outside of the U.S. requires modification.
The tested modem for this eZ80F92 Development Kit is a MultiTech Sys-
tems (formerly Conexant) socket modem, part number SC56H1. Either
the 3.3V or the 5.0V version of the modem can be used. However, jumper
J12 should be configured accordingly—see Table 17. Information about
this modem and its interface is available in the SocketModem data sheet
from www.multitech.com.
Development Platform Memory
®
Memory space on the eZ80
SRAM and additional SRAM footprints.
Onboard SRAM
®
The eZ80 Development Platform features 512KB SRAM at U20. This
SRAM provides the basic memory requirement for small applications
development. This SRAM is in the address range
With the 512KB of SRAM on the eZ80F92 Flash Module, this addressing
structure provides 1MB of contiguous SRAM for immediate use. Chip
Select 2 is used to access the 512KB of SRAM on the eZ80
ment Platform.
Additional SRAM
The amount of eZ80
required by adding SRAM devices. U19, U18, and U17 provide this capa-
bility. However, the user should be aware that additional SRAM must be
installed in the following order:
1. U19, address range
®
Development Platform, LEDs D1, D2, D3, and
®
Development Platform consists of onboard
®
Development Platform memory can be extended if
B00000h–B7FFFFh
PRELIMINARY
.
B80000h–BFFFFFh
®
Develop-
UM013904-0203