INNOVASIC IA8255-PLC44C Programmable peripheral interface adapter Datasheet

Page 1 of 4
IA8255
Advanced Information Sheet
Programmable Peripheral Interface Adapter
FEATURES
•
•
•
•
•
•
Form, Fit, and Function Compatible with the Intel 8255A and Harris
82C55A
Packaging options available: 40 Pin Plastic DIP or 44 Pin Plastic Leaded
Chip Carrier
24 Programmable Input/Outputs
Static Read/Write or Handshaking Modes
Direct Bit Set/Reset Capability
High Speed, No “Wait State” Operation
The IA8255 uses innovASIC’s innovative new f 3 Program to provide industry with parts that
other vendors have declared obsolete. By specifying parts through this program a customer is
assured of never having a component become obsolete again. This advanced information sheet
assumes the original part has been designed in, and so provides a summary of capabilities only. For
new designs contact innovASIC for more detailed information.
Intel is a registered trademark of Intel Corporation
Harris is a copyright trademark of Harris Corporation
PA2
PA3
N. C.
PA4
PA5
PA6
PA7
WR_n
(2)
(1)
(44)
(43)
(42)
(41)
(40)
PA6
PA1
PA5
(38)
40 Pin DIP
(3)
(39)
(3)
PA4
PA0
(2)
PA1
(40)
(4)
PA2
IA8255
RD_n
(1)
(5)
PA3
(6)
Package Pinout
PA0
(4)
(37)
PA7
RD_n
(5)
(36)
WR_n
CS_n
(7)
(39)
RESET
CS_n
(6)
(35)
RESET
GND
(8)
(38)
D0
GND
(7)
(34)
D0
A1
(9)
A1
(8)
(33)
D1
A0
(10)
A0
(9)
(32)
D2
PC7
(11)
PC7
(10)
(31)
D3
N. C.
(12)
PC6
(11)
(30)
D4
PC6
PC5
(12)
(29)
D5
PC4
(13)
(28)
D6
PC0
(14)
(27)
PC1
(15)
PC2
PC3
PB0
(37)
D1
(36)
D2
(35)
D3
(34)
N. C.
(13)
(33)
D4
PC5
(14)
(32)
D5
PC4
(15)
(31)
D6
D7
PC0
(16)
(30)
D7
(26)
VCC
PC1
(17)
(29)
VCC
(16)
(25)
PB7
(17)
(24)
PB6
(18)
(23)
PB5
PB1
(19)
(22)
PB4
PB2
(20)
(21)
PB3
IA8255
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
PC2
PC3
PB0
PB1
PB2
N. C.
PB3
PB4
PB5
PB6
PB7
Copyright  1999, InnovASIC Inc.
Customer Specific IC Solutions
44 Pin LCC
Page 2 of 4
IA8255
Advanced Information Sheet
Programmable Peripheral Interface Adapter
The IA8255 is a programmable peripheral interface adapter mega-function designed to be
functionally equivalent to the Intel 8255A and Harris 82C55A devices. This function has 24 I/O
signals programmable in two groups of 12. Three modes of operation allow the following:
•
•
•
Basic Input/Output (Mode 0) - Port A, Port B, Port C (upper), and Port C (lower) can be
independently configured as inputs or outputs to read or hold static data. Outputs are
latched, but inputs are not latched.
Strobed Input/Output (Mode 1) - Port A and Port B can be independently configured as
strobed input or output buses. Signals from Port C are dedicated as control signals for data
handshaking.
Bidirectional Bus (Mode 2) - Port A can also be configured as a bidirectional bus, with the
majority of Port C providing the control signals. In this case, Port B is still capable of
implementing one of the previous described modes.
A block diagram is shown in Figure 1.
Functional Block Diagram
Figure 1
8 BIT INTERNAL
DATA BUS
D7:D0
DATA BUS
BUFFER
GROUP A
PORT A
(8)
I/O
PA7:PA0
GROUP A
CONTROL
GROUP A
PORT C
UPPER (4)
RESET
CS_n
RD_n
WR_n
CONTROL
REGISTER AND
LOGIC
GROUP B
CONTROL
GROUP B
PORT C
LOWER
(4)
I/O
PC7:PC4
I/O
PC3:PC0
A0
A1
GROUP B
PORT B
(8)
Copyright  1999, InnovASIC Inc.
Customer Specific IC Solutions
I/O
PB7:PB0
Page 3 of 4
IA8255
Advanced Information Sheet
Programmable Peripheral Interface Adapter
Table 1
Part Number
IA8255-PDW40C
IA8255-PLC44C
IA8255-PDW40I
IA8255-PLC44I
Qualification Levels
Environmental/ Qual Level
Commercial
Commercial
Industrial
Industrial
The following diagram depicts the innovASIC Product Identification Number.
IAXXXXX-PPPPNNNT/SP
Special Processing:
S = Space
Q = MIL-STD-883
Temperature:
C = Commercial
I = Industrial
M = Military
Number of Leads
Package Type:
Per Package Designator Table
IC Base Number
innovASIC Designator
Copyright  1999, InnovASIC Inc.
Customer Specific IC Solutions
Page 4 of 4
IA8255
Advanced Information Sheet
Programmable Peripheral Interface Adapter
Package Designator Table
Package Type
innovASIC
Designator
Ceramic side brazed Dual In-line
Cerdip with window
Ceramic leaded chip carrier
Cerdip without window
Ceramic leadless chip carrier
PLCC
Plastic DIP standard (300 mil)
Plastic DIP standard (600 mil)
Plastic metric quad flat pack
Plastic thin quad flat pack
Skinny Cerdip
Small outline plastic gull-wing(150 mil body)
Small outline medium plastic gull-wing (207 mil body)
Small outline narrow plastic gull wing (150 mil body)
Small outline wide plastic gull wing (300 mil body)
Skinny Plastic Dip
Shrink small outline plastic (5.3mm .208 body)
Thin shrink small outline plastic
Small outline large plastic gull wing (330 mil body)
Thin small outline plastic gull-wing (8 x 20mm) [TSOP]
CDB
CDW
CLC
CD
CLL
PLC
PD
PDW
PQF
PTQ
CDS
PSO
PSM
PSN
PSW
PDS
PS
PTS
PSL
PST
PGA
BGA
CPGA
CBGA
Contact innovASIC for other package and processing options.
Copyright  1999, InnovASIC Inc.
Customer Specific IC Solutions
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