Samsung S3F80JB manual EMT External Memory Timing Register Note FEH Set1 Bank0

CONTROL REGISTERSS3F80JB

EMT — External Memory Timing Register (NOTE) FEH Set1 Bank0

Bit Identifier

Reset Value

Read/Write

Addressing Mode

.7	.6	.5	.4	.3	.2	.1	.0
0	1	1	1	1	1	0	–
R/W	R/W	R/W	R/W	R/W	R/W	R/W	–

Register addressing mode only

.7	External WAIT Input Function Enable Bit
	0	Disable WAIT input function for external device
	1	Enable WAIT input function for external device
.6	Slow Memory Timing Enable Bit
	0	Disable slow memory timing
	1	Enable slow memory timing
.5 and .4	Program Memory Automatic Wait Control Bits
	0	0	No wait
	0	1	Wait one cycle
	1	0	Wait two cycles
	1	1	Wait three cycles
.3 and .2	Data Memory Automatic Wait Control Bits
	0	0	No wait
	0	1	Wait one cycle
	1	0	Wait two cycles
	1	1	Wait three cycles
.1	Stack Area Selection Bit
	0	Select internal register file area
	1	Select external data memory area

.0

Not used for S3F80JB

NOTE: The EMT register is not used for S3F80JB, because an external peripheral interface is not implemented in the S3F80JB. The program initialization routine should clear the EMT register to '00H' following a reset. Modification of EMT values during normal operation may cause a system malfunction.

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