Zilog EZ80190 - Manual (Page 34)

eZ80190 Development Kit
User Manual
eZ80Acclaim! Development Platform UM014108-0810
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 of the U.S. requires modification.
6 D1 DCD indicator; can drive an LED anode without additional circuitry.
7 D2 RxD indicator; can drive an LED anode without additional circuitry.
8 D3 DTR indicator; can drive an LED anode without additional circuitry.
9 D4 TxD indicator; can drive an LED anode without additional circuitry.
Table 12. Connector J1
Pin Symbol Description
2 MOD_DIS Modem disable, active Low.
4 V
CC
+5 VDC or +3.3 VDC input.
24 GND Ground.
25 PC4_DTR1 DTR interface; TTL levels.
26 PC6_DCD1 DCD interface; TTL levels.
27 PC3_CTS1 CTS interface; TTL levels.
28 PC5_DSR1 DSR interface; TTL levels.
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 11. Connector J9