HS1-82C55ARH-8 Intersil, HS1-82C55ARH-8 Datasheet - Page 16

• Manufacturer Part Number: HS1-82C55ARH-8
• Manufacturer: Intersil

Specifications of HS1-82C55ARH-8

• Operating Temperature (max): 125C
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Compliant

Current Drive Capability
Any output on Port A, B or C can sink or source 2.5mA. This
feature allows the 82C55A to directly drive Darlington type
drivers and high-voltage displays that require such sink or
source current.
Reading Port C Status (Figures 23 and 24)
In Mode 0, Port C transfers data to or from the peripheral
device. When the 82C55A is programmed to function in
Modes 1 or 2, Port C generates or accepts “hand shaking”
signals with the peripheral device. Reading the contents of
Port C allows the programmer to test or verify the “status” of
each peripheral device and change the program flow
accordingly.
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HS-82C55ARH
There is no special instruction to read the status information
from Port C. A normal read operation of Port C is executed to
perform this function.
FIGURE 25. INTERRUPT ENABLE FLAGS IN MODES 1 AND 2
ENABLE FLAG
INTERRUPT
INTE A2
INTE A1
INTE B
POSITION
PC2
PC4
PC6
ACKB (Output Mode 1) or
STBB (Input Mode 1)
STBA (Input Mode 1 or
Mode 2)
ACKA (Output Mode 1 or
Mode 2)
ALTERNATE PORT C
PIN SIGNAL (MODE)