Ez80 ® Development Platform Memory - ZiLOG eZ80L92 User Manual

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 eZ80L92 Development Kit is a Conexant socket
modem, part number SF56D/SP. Information about this modem and its inter-
face is available in the SmartSCM SocketModem data sheet (Doc. No.
101522D) from www.conexant.com.
eZ80 ® Development Platform Memory
Memory space on the eZ80
SRAM and additional footprints.
Onboard SRAM
The eZ80
SRAM provides the basic memory requirement for small applications
development. This SRAM is in the address range
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
2. U18, address range
3. U17, address range
If SRAM memory is installed in a different order than the above
sequence, SRAM will not be contiguous unless the user is able to change
the address decoder, U10. Memory access decoding is performed by this
UM012906-0103
®
Development Platform, LEDs D1, D2, D3, and
®
®
Development Platform features 512KB SRAM at U20. This
®
Development Platform memory can be extended if
B00000h–B7FFFFh
A80000h–AFFFFFh
A00000h–A7FFFFh
PRELIMINARY
eZ80L92 Development Kit
Development Platform consists of onboard
User Manual
B80000h–BFFFFFh
Operational Description
31
.