|
|
Numéro de référence | UPB8214 | ||
Description | PRIORITY INTERRUPT CONTROLLER | ||
Fabricant | NEC | ||
Logo | |||
1 Page
NEe Microcomputers, Inc.
NEC
fL PB8214
PRIORITY INTERRUPT CONTROLLER
DESCRIPTION
The jlPB8214 is an eight-level priority interrupt controller. Designed to simplify
interrupt driven microcomputer systems, the jlPB8214 requires a single +5V power
supply and is packaged in a 24 pin plastic Dual-in-line package.
The jlPB8214 accepts up to eight interrupts, determines which has the highest priority
and then compares that priority with a software created current status register. If the
incoming requires is of a higher priority than the interrupt currently being serviced, an
interrupt request to the processor is generated. Vector information that identifies tl"1 Q
interrupting device is also generated.
The interrupt structure of the microcomputer system can be expanded beyond eight
interrupt levels by cascading jlPB8214s. The jlPB8214's interrupt and vector informa-
tion outputs are open collector and control signals are provided to simplify expansion
of the interrupt structure.
F EATU RES • Eight Priority Levels
• Current Status Register and Priority Comparator
• Easily Expanded Interrupt Structure
• Single +5 Volt Supply
PIN CONFIGURATION B(j
B,
B2
SGS 4
5
ClK 6
INTE
AD 8
Ai 9
IS 10
GND 12
vcc
ECS
22 FG
21 R6
20 R5
j..tPB 19 R4
8214 18 R3
17 R2
16 R,
15 RO
14 ENlG
13 ETlG
Inputs
RO R7
60 , B2
SGS
Ees
INTE
eLK
ELR
ETLG
Outputs
AO--A2
INT
ENLG
PIN NAMES
Request Levels IR7 Highest PnorHyl
Current Status
Status Group Select
Enable Current Status
Interrupt Enable
Clock liNT F·F)
Enable Level Read
Enable ThIs Level Group
Request Levels
JOpen
Interrupt (Act. Low) ~Collector
Enable Next Level Group
II
553
|
|||
Pages | Pages 7 | ||
Télécharger | [ UPB8214 ] |
No | Description détaillée | Fabricant |
UPB8212 | 8-Bit Input/Iutput Port | NEC Electronics |
UPB8214 | PRIORITY INTERRUPT CONTROLLER | NEC |
UPB8216 | (UPB8216 / UPB8226) 4-Bit Parallel Bidirectional Bus Drivers | NEC |
US18650VTC5A | Lithium-Ion Battery | Sony |
TSPC106 | PCI Bus Bridge Memory Controller | ATMEL |
TP9380 | NPN SILICON RF POWER TRANSISTOR | Advanced Semiconductor |
www.DataSheetWiki.com | 2020 | Contactez-nous | Recherche |