ZiLOG eZ80L92 User Manual page 37

Table 9. Bit Access to the LED Cathode, Modem, and Triggers (Continued)
Function
Cathode Row 1
Modem RST
Trig 1
Trig 2
An LED display sample program is shipped with the eZ80L92 Develop-
ment Kit. Please refer to the eZ80
(QS0015) or to the Tutorial section in the
(UM0123).
Modem Reset
The Modem Reset signal, MRESET, is used to reset an optional socket
modem. This signal is controlled by bit 5 in the register shown in Table 9.
The MRESET signal is available at the embedded modem socket inter-
face (J9, Pin1). Setting this bit Low places the optional socket modem into
a reset state. The user must pull this bit High again to enable the socket
modem. Reference the appropriate documentation for the socket modem to
reset timing requirements.
User Triggers
Two general-purpose trigger output pins are provided on the eZ80
Development Platform. Labeled J21 (Trig2) and J22 (Trig1), these pins
allow the user a way to trigger external equipment to aid in the debug of
the system. See Figure 8 for trigger pin details.
UM012906-0103
Bit #
7 6 5 4
X
X
X
X
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