ID82C55A Intersil, ID82C55A Datasheet - Page 16

• Manufacturer Part Number: ID82C55A
• Description: IC I/O EXPANDER 24B 40DIP
• Manufacturer: Intersil

Specifications of ID82C55A

• Interface: Programmable
• Number Of I /o: 24
• Interrupt Output: No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 40-CDIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Frequency - Clock: -

FIGURE 21. DIGITAL TO ANALOG, ANALOG TO DIGITAL
SET/RESET
INTERRUPT
INTERRUPT
(OUTPUT)
REQUEST
REQUEST
FIGURE 19. KEYBOARD AND DISPLAY INTERFACE
MODE 0
MODE 0
82C55A
(INPUT)
BIT
(OUTPUT)
MODE 1
MODE 1
(INPUT)
82C55A
PC4
PC5
PC6
PC7
PC0
PC1
PC2
PC3
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC3
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC4
PC5
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC1
PC2
PC6
PC7
LSB
STB DATA
SAMPLE EN
STB
LSB
MSB
MSB
CONVERTER
CONVERTER
16
12-BIT
(DAC)
(ADC)
8-BIT
D/A
A/D
R0
R1
R2
R3
R4
R5
SHIFT
CONTROL
STROBE
ACK
B0
B1
B2
B3
B4
B5
BACKSPACE
CLEAR
DATA READY
ACK
BLANKING
CANCEL WORD
BURROUGHS
KEYBOARD
SELF-SCAN
DECODED
DISPLAY
FULLY
ANALOG
OUTPUT
ANALOG
INPUT
82C55A
INTERRUPT
FIGURE 20. KEYBOARD AND TERMINAL ADDRESS
REQUEST
INTERRUPT
REQUEST
FIGURE 22. BASIC CRT CONTROLLER INTERFACE
(OUTPUT)
(OUTPUT)
MODE 1
MODE 0
82C55A
MODE 1
MODE 0
(INPUT)
82C55A
(INPUT)
INTERFACE
PC3
PC3
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC7
PC6
PC5
PC4
PC2
PC1
PC0
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC4
PC5
PC6
PC7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
R0
R1
R2
R3
R4
R5
SHIFT
CONTROL
DATA READY
ACK
BLANKED
BLACK/WHITE
ROW STB
COLUMN STB
CURSOR H/V STB
R0
R1
R2
R3
R4
R5
SHIFT
CONTROL
STROBE
ACK
BUST LT
TEST LT
CURSOR/ROW/COLUMN
ADDRESS
H&V
CRT CONTROLLER
² CHARACTER GEN.
² REFRESH BUFFER
² CURSOR CONTROL
KEYBOARD
DECODED
FULLY
TERMINAL
ADDRESS
November 16, 2006
FN2969.10