Intel Microcontroller, 80C196NU Table C-7. BUSCONx Addresses and Reset Values, Buscon Address

8XC196NP, 80C196NU USER’S MANUAL

BUSCONx

BUSCONx	Address:	Table C-7
x = 0–5	Reset State:

For the address range assigned to chip-select x, the bus control (BUSCONx) register specifies the number of wait states, the bus width, and the address/data multiplexing for all external bus cycles that access address range x.

7

DEMUX BW16 — —

0

— — WS1 WS0

Bit	Bit			Function
Number	Mnemonic
7	DEMUX	Address/Data Multiplexing
		This bit specifies the address/data multiplexing on AD15:0 for all
		external accesses to the address range assigned to chip-select output x.
		0	= multiplexed
		1	= demultiplexed
6	BW16	Bus Width
		This bit specifies the bus width for all external accesses to the address
		range assigned to chip-select output x.
		0	= 8 bits
		1	= 16 bits
5:2	—	Reserved; for compatibility with future devices, write zeros to these bits.
1:0	WS1:0	Wait States
		These bits specify the number of wait states for all external accesses to
		the address range assigned to chip-select output x.
		WS1 WS0		Wait States
		0	0	0
		0	1	1
		1	0	2
		1	1	3

Table C-7. BUSCONx Addresses and Reset Values

Register	Address	Reset Value
BUSCON0	1F44H	03H
BUSCON1	1F4CH	00H
BUSCON2	1F54H	00H
BUSCON3	1F5CH	00H
BUSCON4	1F64H	00H
BUSCON5	1F6CH	00H

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