Mitsubishi DS5000TK manual DS5001/DS5002 RPC Control Register, Label Rpctl Register Address 0D8H

USER'S GUIDE

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 μs are required to generated the next number.
Initialization:	Cleared after all resets. Bit will be set approximately 160 μsec 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.
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