Zilog EZ80L92 - Manual (Page 34)

eZ80L92 Development Kit
User Manual
Operational Description UM012913-0407
30
Components P4, T1, C3, C4, and U11 provide the phone line interface to
the modem. On the eZ80Acclaim!
® Development Platform, LEDs D1,
D2, D3, and 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 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 eZ80Acclaim! ® Development Platform consists of
onboard SRAM and additional footprints.
Onboard SRAM
The eZ80Acclaim!
® Development Platform features 512 KB SRAM at
U20. This SRAM provides the basic memory requirement for small appli-
cations development. This SRAM is in the address range
B80000h
–
BFFFFFh
.
Additional SRAM
The amount of eZ80Acclaim!
® Development Platform memory can be
extended if required by adding SRAM devices. U19, U18, and U17 pro-
29 PC7_RI1 Ring Indicator interface; TTL levels.
30 PC0_TXD1 TxD interface; TTL levels.
31 PC1_RXD1 RxD interface; TTL levels.
32 PC2_RTS1 RTS interface; TTL levels.
Table 12. Connector J1