Mitsubishi Motors DS5000TK - Manual (Page 43)

USER’S GUIDE
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DS5001/DS5002 RPC CONTROL REGISTER
Label: RPCTL Register Address: 0D8H
RNR ––– EXBS AE IBI DMA RPCON RG0
Bit Description:
RPCTL.7 RNR
When internal hardware sets this read–only bit to a 1, a new value may be
read from the random number generator register of the DS5001/DS5002
(RNR;0CFh). This bit is cleared when the random number is read, and
approximately 160
µ s are required to generated the next number.
Initialization: Cleared after all resets. Bit will be set approximately 160
µ
sec after a reset.
Read Access: Can be read at any time.
Write Access: Cannot be written.
RPCTL.5 EXBS
The Expanded Bus Select routes data memory access (MOVX) to the
expanded bus formed by ports 0 and 2 when set.
Initialization: Cleared after all resets.
Read Access: Can be read at any time.
Write Access: Can be written at any time.
RPCTL.4 AE
Access Enable is used when a software reload is desired without using the
Bootstrap Loader. When set, the device will be temporarily configured in a
Partitionable configuration with the Partition at 4K. This will occur even if the
PM=1. When cleared, the prior memory configuration is resumed.
Initialization: Cleared after all resets.
Read Access: Can be read at any time.
Write Access: Can be written at any time, Timed Access protected.
RPCTL.3 IBI
When using the RPC mode, an interrupt may be required for the Input
Buffer Flag. This interrupt is enabled by setting the Input Buffer Interrupt
(IBI) bit. At this time, the timer 1 interrupt is disabled, and this RPC mode
interrupt is used in its place (vector location 1BH). This bit can be set only
when the RPCON bit is set.
Initialization: Cleared on all resets, and when the RPCON bit is cleared.
Read Access: Can be read at any time.
Write Access: Can be written when the RPC mode is enabled (RPCON=1).
RPCTL.2 DMA
This bit is set to enable DMA transfers when RPC mode is invoked. It can
only be set when RPCON=1.
Initialization: Cleared on all resets, and when RPC is cleared.