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Commodore - SINGLE PORT INTERFACE

Numéro de référence 6529
Description SINGLE PORT INTERFACE
Fabricant Commodore 
Logo Commodore 





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6529 fiche technique
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6529
SINGLE-PORT
INTERFACE
6529 SINGLE PORT INTERFACE
DESCRIPTION
The 6529 is a static microprocessor compatible, 8-bit I/O Port with passive output pull-up devices.
Data is written to the port when CS and RNI/ are low. Data is read from the port when CS is low and RNI/
is high. The passive output pull-ups allow a single bit to act as either an input or an output without I/O
mode switching.
This device is provided with special circuitry to provide power-on reset. Under normal fast power-
on conditions the outputs will initialize in the input high impedance state. With very slow or noisy
power-up, there is some possibility the device will initialize with putputs driven low. It is recommended
that the 6529 be interfaced to open collector output type devices.
TRUTH TABLE
CS RNI/
00-0 7
L L DATA BUS TO PORT
L H PORT TO DATA BUS
H X ISOLATION
L = LOW Level
H= HIGH Level
X =1 rrelevant
ORDER INFORMATION
MXS 6529
L
FREQUENCY RANGE
NO SUFFIX = 1 MHz
aA = 2 MHz
= 3 MHz
' - - - - - - PACKAGE DESIGNATOR
C = Ceramic
P = Plastic
2-92
PIN CONFIGURATION
RNI/ 20 VDD
PO 2
19 CS
P1 3
18 DBO
P2 4
17 DB1
P3 5 6529 16 DB2
P4 6
15 DB3
P5 7
14 DB4
P6 8
13 DB5
P7 9
12 DB6
VSS 10
11 DB7

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