General Use Register Memory Map68C3 Operations Manual North Atlantic Industries, Inc. 12/19/2014Rev: 2014-12-19-0947 www.naii.com Page 302 of 330Board ReadyType: binary wordRange: not applicableRead/Write: RInitialized Value: not applicablePoll register. Board is ready to be accessed only after you read “AA55”. (as much as 10 seconds). Following a soft reset,Board Ready continues to indicate 0xAA55 until approx 150ms have elapsed. After that time the card is undergoing reset andthe register indicates 0x0000. Following a soft reset, wait 200ms before polling Board Ready. The register indicates 0xAA55which is board ready. You may proceed with read/write/coding activity after that change.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONBOARD READY D D D D D D D D D D D D D D D D D=DATA BITWatchdog TimerType: binary wordRange: not applicableRead/Write: RInitialized Value: 0hThis register implements a Watchdog timer. When it detects that a value, or word, has been written to it, that word will beinverted within 70 μs. The inverted word remains until replaced by a new word. The user, after 70 μs, looks for the invertedword to confirm that the processor is operating.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONWATCHDOG TIMER D D D D D D D D D D D D D D D D D=DATA BITSoft ResetType: unsigned integerRange: 0 to 1Read/Write: RInitialized Value: 0Level sensitive. Writing a “1” initiates and holds software in reset state. Then, writing “0” initiates reboot (depending uponconfiguration, takes up to 10 seconds). This function is equivalent to a power-on reset.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONSOFT RESET X X X X X X X X X X X X X X X D D=DATA BITInterrupt Level (Not Used)Type: unsigned integerRange: 0 to 7Read/Write: RInitialized Value: 0hThis register is used to define the Interrupt Priority Level. Enter 0 to disable interrupts. Enter in priority level 0 through 7otherwise.REGISTER D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 FUNCTIONINTERRUPT LEVEL X X X X X X X X X X X X X D D D D=DATA BIT
