IN82C55 Datasheet, PDF (10/22 Pages) IK Semicon Co., Ltd – Compatible with all Intel and Most Other Microprocessors

CONTROL WORD #10
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
10010010
8
A
PA₇-PA₀
D₇-D₀
4
PC₇-PC₄
C… ₄
PC₃-PC₀
8
B
PB₇-PB₀
CONTROL WORD #12
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
10011000
8
A
PA₇-PA₀
D₇-D₀
4
PC₇-PC₄
C… ₄
PC₃-PC₀
8
B
PB₇-PB₀
CONTROL WORD #14
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
10011010
8
A
PA₇-PA₀
D₇-D₀
4
PC₇-PC₄
C… ₄
PC₃-PC₀
8
B
PB₇-PB₀
IN82C55A
CONTROL WORD #11
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
10010011
8
A
PA₇-PA₀
D₇-D₀
4
PC₇-PC₄
C… ₄
PC₃-PC₀
8
B
PB₇-PB₀
CONTROL WORD #13
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
10011001
8
A
PA₇-PA₀
D₇-D₀
4
PC₇-PC₄
C… ₄
PC₃-PC₀
8
B
PB₇-PB₀
CONTROL WORD #15
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
10011011
8
A
PA₇-PA₀
D₇-D₀
4
PC₇-PC₄
C… ₄
PC₃-PC₀
8
B
PB₇-PB₀
Operating Modes
MODE 1 (Strobed Input/Output). This functional configuration provides a means for transferring I/O data to or from
a specified port in conjunction with strobes or “handshaking” signals. In mode 1, Port A and Port B use the lines on
Port C to generate or accept these “handshaking” signals.
Mode 1 Basic functional Definitions:
• Two Groups (Group A and Group B).
• Each group contains one 8-bit data port and one 4-bit control/data port.
• The 8-bit data port can be either input or output
• Both inputs and outputs are latched.
• The 4-bit port is used for control and status of the
Rev. 00