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MSC8101 Datasheet

  • MSC8101

  • Networking Digital Signal Processor

  • 1873.07KB

  • Motorola   Motorola

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Reset, Configuration, and EOnCE Event Signals
Table 1-3.
Signal Name
CLKOUT
DLLIN
Clock Signals (Continued)
Signal Description
Type
Output
Input
Clock Out
The system bus clock.
DLLIN
Synchronizes with an external device.
Note:
When the DLL is disabled, connect this signal to GND.
1.3 Reset, Configuration, and EOnCE Event Signals
Table 1-4.
Signal Name
DBREQ
Reset, Configuration, and EOnCE Event Signals
Signal Description
Type
Input
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.
EE0
1
Input
Output
HPE
Input
Debug request, enable Address Event Detection Channel 0, or generate an EOnCE event.
Detection by Address Event Detection Channel 0. Used to trigger external debugging equipment.
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.
EE1
1
Input
Output
EE2
1
Enable Address Event Detection Channel 1 or generate an EOnCE event.
Debug Acknowledge or detection by Address Event Detection Channel 1. Used to trigger external
debugging equipment.
EOnCE Event 2
After PORESET is deasserted, you can configure EE2 as an input (default) or an output.
Input
Enable Address Event Detection Channel 2 or generate an EOnCE event or enable the Event
Counter.
Detection by Address Event Detection Channel 2. Used to trigger external debugging equipment.
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.
Output
EE3
1
Input
Output
Enable Address Event Detection Channel 3 or generate one of the EOnCE events.
The DSP has read the EOnCE Receive Register (ERCV). Triggers external debugging equipment.
MSC8101 Technical Data, Rev. 16
Freescale Semiconductor
1-5

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