82C89 Datasheet, PDF (7/15 Pages) Intersil Corporation – CMOS Bus Arbiter

82C89
XACK(I/O BUS)
AEN1
82C84A/85
CLOCK
RDY1 RDY2
READY
CLK AEN2
READY
CLK
8089
IOP
82C89
BUS
ARBITER
CLK
V_CC
S0-S2
IOB
RESB
ANYRQST
AEN
XACK
MULTI-MASTER
SYSTEM BUS
MULTI-MASTER
CONTROL BUS
I/O
COMMAND
BUS
I/O
ADDRESS
BUS
AD0-AD15 ^S0
A16-A19 S2
PROCESSOR
LOCAL BUS
OE STB
ADDRESS
LATCH
82C82/
82C83H
(2 OR 3)
STATUS (S0, S1, S2)
AEN
82C88
BUS
CONTROLLER
OE STB
ADDRESS
LATCH
82C82/
82C83H
(2 OR 3)
CLK
ALE
IOB
PDEN DEN DT/R
MULTI-MASTER
SYSTEM
COMMAND BUS
V_CC
MULTI-MASTER
SYSTEM
ADDRESS BUS
XCVR
DISABLE
I/O
DATA
BUS
OE
T
TRANSCEIVER
82C86H/
82C87H
(2)
OE
T
TRANSCEIVER
82C86H/
82C87H
(2)
FIGURE 5. TYPICAL MEDIUM COMPLEXITY IOB SYSTEM
MULTI-MASTER
SYSTEM
DATA BUS
4-349