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VR4102 Datasheet(PDF) 355 Page - NEC

Part # VR4102
Description  64/32-bit Microprocessor
PDF  701 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

VR4102 Datasheet(HTML) 355 Page - NEC

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CHAPTER 17 DSU (DEADMAN’S SWITCH UNIT)
This chapter describes the DSU (Deadman’s Switch Unit)’s operations and register settings.
17.1 GENERAL
The DSU detects when the VR4102 is in runaway (endless loop) state and resets the VR4102 to minimize
runaway time. The use of the DSU to minimize runaway time effectively minimizes data loss that can occur due to
software-related runaway states.
17.2 REGISTER SET
The DSU registers are listed below.
Table 17-1. DSU Registers
Address
R/W
Symbol
Function
0x0B00 00E0
R/W
DSUCNTREG
DSU Control Register
0x0B00 00E2
R/W
DSUSETREG
DSU Dead Time Set Register
0x0B00 00E4
W
DSUCLRREG
DSU Clear Register
0x0B00 00E6
R/W
DSUTIMREG
DSU Elapsed Time Register
Each register is described in detail below.



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