MB2646 Datasheet, PDF (3/16 Pages) NXP Semiconductors – Dual octal bus transceiver/registers 3-State

Philips Semiconductors Products
Dual octal bus transceiver/registers (3-State)
The following examples demonstrate the four
fundamental bus-management functions that
can be performed with the MB2646.
REAL TIME BUS TRANSFER
BUS B TO BUS A
REAL TIME BUS TRANSFER
BUS A TO BUS B
Product specification
MB2646
STORAGE FROM
A, B, OR A AND B
A
B
A
B
A
B
nOE nDIR nCPAB nCPBA nSAB nSBA
L
L
X
X
XL
nOE nDIR nCPAB nCPBA nSAB nSBA
L
H
X
X
LX
TRANSFER STORED DATA
TO A OR B
nOE
L
L
H
nDIR
H
L
X
nCPAB nCPBA
↑
X
X
↑
↑
↑
nSAB nSBA
XX
XX
XX
August 23, 1993
A
B
nOE
L
L
nDIR nCPAB nCPBA nSAB nSBA
L
X
H|L
XH
H H|L
X
HX
3