CP82C89Z Intersil, CP82C89Z Datasheet - Page 9

• Manufacturer Part Number: CP82C89Z
• Description: IC ARBITER BUS 5V 8MHZ 20-DIP
• Manufacturer: Intersil

Specifications of CP82C89Z

• Controller Type: CMOS Priority Interrupt Controller
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 1mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

NOTES:
NOTES:
I/O
Commands
Halt
Memory
Commands
Idle
Single Bus Multi-Master Mode
RESB Mode Only
IOB Mode Only
IOB Mode RESB Mode
1. X = Multi-Master System Bus is allowed to be Surrendered.
2. † = Multi-Master System Bus is Requested.
1. IOB Active Low.
2. RESB Active High.
3. + is read as “OR” and • as “AND”
4. TI = Processor Idle Status S2, S1, S0 = 111
5. HLT = Processor Halt Status S2, S1, S0 = 011
* LOCK prevents surrender of Bus to any other arbiter, CRQLCK prevents surrender of Bus to any lower priority arbiter.
** Except for HALT and Passive or IDLE Status.
‡ HPBRQ, Higher priority Bus request or BPRN = 1.
80C86 OR 80C88 OR 8088
SINGLE LINES FROM
TABLE 1. SUMMARY OF 82C89 MODES, REQUESTING AND RELINQUISHING THE MULTI-MASTER SYSTEM BUS
MODE
S2
0
0
0
0
1
1
1
1
S1
0
0
1
1
0
0
1
1
S0
0†
0
1
0
1
0
1
1
9
RESB = LOW
IOB = High RESB =
Low
IOB = High RESB =
High
IOB = Low
RESB = Low
IOB = Low
RESB = High
IOB = LOW
IOB MODE
ONLY
STRAPPING
X
X
X
X
X
†
†
†
PIN
SYSB/RESB =
IOB = HIGH, RESB = HIGH
Whenever the processor’s status lines go
active
SYSB/RESB + High •
ACTIVE STATUS
Memory Commands
(Memory Command) •
(SYSB/RESB = High)
HIGH
RESB MODE ONLY
†
†
†
X
†
†
†
X
82C89
REQUESTED**
SYSB/RESB =
LOW
X
X
X
X
X
X
X
X
MULTI-MASTER SYSTEM BUS
SYSB/RESB =
IOB = LOW, RESB = HIGH
IOB MODE RESB MODE
HIGH
X
X
X
X
†
†
†
X
HLT + TI • CBRQ + HPBRQ ‡
(SYSB/RESB = Low + TI) •
CBRQ + HLT + HPBRQ
(I/O Status + TI) • CBRQ + HLT +
HPBRQ
(I/O Status Commands) +
SYSB/RESB = Low) • CBRQ +
HPBRQ + HLT
SYSB/RESB =
LOW
SURRENDERED*
X
X
X
X
X
X
X
X
RESB = LOW
SINGLE BUS
IOB = HIGH
February 27, 2006
MODE
X
X
†
†
†
†
†
†
FN2980.2