KK82C55 View Datasheet(PDF) - Kodenshi Auk Co., LTD
Part Name
Description
Manufacturer
KK82C55 Datasheet PDF : 22 Pages
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KK82C55A
WR
OBF
INTR
ACK
OUTPUT
tWIT
tWOB
tWB
tAOB
tAK
tAIT
Figure 11. MODE 1 (Strobed Output)
Combinations of MODE 1
Port A and Port B can be individually defined as input or output in Mode 1 to support a wide variety of strobed I/O
applications.
CONTROL WORD
D7 D6 D5 D4 D3 D2 D1 D0
1 0 1 1 1/0 1 0 X
PC6,7
1 = INPUT
0 = OUTPUT
WR
PORT A – STROBED INPUT
RD
PORT B – STROBED OUTPUT
PA7-PA0
PC4
PC5
PC3
PC6,7
8
STBA
IBFA
CONTROL WORD
D7 D6 D5 D4 D3 D2 D1 D0
1 0 1 0 1/0 1 1 X
INTRA
2
PC4,5
1 = INPUT
0 = OUTPUT
PB7-PB0
PC1
PC2
PC0
8
OBFB
ACKB
INTRB
WR
PORT A – STROBED OUTPUT RD
PORT B – STROBED INPUT
PA7-PA0
8
PC7
PC6
PC3
PC4,5
OBFA
ACKA
INTRA
2
PB7-PB0
PC2
PC1
PC0
8
STBB
IBFB
INTRB
Operating Modes
Figure 12. Combinations of MODE 1
MODE 2 (Strobed Bidirectional Bus I/O).This functional configuration provides a means for communicating with a
peripheral device or structure on a single 8-bit bus for both transmitting and receiving data (bidirectional bus I/O).
“Handshaking” signals are provided to maintain proper bus flow discipline in a similar manner to MODE 1. Interrupt
generation and enable/disable functions are also available.
MODE 2 Basic Functional Definitions:
• Used in Group A only.
• One 8-bit, bi-directional bus port (Port A) and a 5- bit control port (Port C).
• Both inputs and outputs are latched.
• The 5-bit control port (Port C) is used for control and status for the 8-bit, bi-directional bus port (Port A).
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