Embedded modem socket interface – Zilog EZ80L92 User Manual
Page 31
eZ80L92 Development Kit
User Manual
UM012913-0407
Operational
Description
27
User Triggers
Two general-purpose trigger output pins are provided on the
eZ80Acclaim!
®
Development Platform. Labeled J21 (Trig2) and J22
(Trig1), these pins allow you to trigger external equipment to aid in the
debug of the system. See
for trigger pin details.
Bit 6 and Bit 7 in
are the control bits for the user triggers. If either
bit is a 1, the corresponding Trig1 and Trig2 signals are driven High. If
either bit is 0, the corresponding Trig1 and Trig2 signals are driven Low.
Embedded Modem Socket Interface
The eZ80Acclaim!
®
Development Platform features a socket for an
optional 56K modem (a modem is not included in the kit).
Connectors J1, J5, and J9 provide connection capability. The modem
socket interface provided by these three connectors is shown in
identify the pins for each connector. The embedded
modem utilizes UART1, which is available via the Port C pins.
Figure 8. Trigger Pins J21 and J22
J21
Trig2
J22
Trig1
Ground
Trigger output