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1-6
Reset, Configuration, and EOnCE Event Signals
1.4 Reset, Configuration, and EOnCE Event Signals
Table 1-3. Reset, Configuration, and EOnCE Event Signals
Signal Name
Type
Signal Description
DBREQ
EE0
1
Input
Input
Output
Debug Request
Determines whether to go into SC140 Debug mode when PORESET is deasserted.
Enhanced OnCE (EOnCE) Event 0
After PORESET is deasserted, you can configure EE0 as an input (default) or an output.
Debug request, enable Address Event Detection Channel 0, or generate one of the
EOnCE events.
Detection by Address Event Detection Channel 0. Used to trigger external debugging
equipment.
HPE
EE1
1
Input
Input
Output
Host Port Enable
When this pin is asserted during PORESET, the Host port is enabled, the system data bus
is 32 bits wide, and the Host
must
program the reset configuration word.
EOnCE Event 1
After PORESET is deasserted, you can configure EE1 as an input (default) or an output.
Enable Address Event Detection Channel 1 or generate one of the EOnCE events.
Debug Acknowledge or detection by Address Event Detection Channel 1. Used to trigger
external debugging equipment.
EE2
1
Input
Output
EOnCE Event 2
After PORESET is deasserted, you can configure EE2 as an input (default) or an output.
Enable Address Event Detection Channel 2 or generate one of the EOnCE events or
enable the Event Counter.
Detection by Address Event Detection Channel 2. Used to trigger external debugging
equipment.
EE3
1
Input
Output
EOnCE Event 3
After PORESET is deasserted, you can configure EE3 as an input (default) or an output.
See the
Emulation and Debug
chapter in the
SC140 DSP Core Reference Manual
for
details on the ERCV Register.
Enable Address Event Detection Channel 3 or generate one of the EOnCE events.
EOnCE Receive Register (ERCV) was read by the DSP. Used to trigger external
debugging equipment.