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UPD782 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - DOT MATRIX PRINTER CONTROLLER - NEC

भाग संख्या UPD782
समारोह DOT MATRIX PRINTER CONTROLLER
मैन्युफैक्चरर्स NEC 
लोगो NEC लोगो 
पूर्व दर्शन
1 Page
		
<?=UPD782?> डेटा पत्रक पीडीएफ

UPD782 pdf
ILPD782
cs
C/O-+--I
WAD Ai---t.__--.J
iNT _+------,-______...J
BLOCK DIAGRAM
MTO
ffi
fi'FR
RBN/PAS
Si'M
VDR{TOF
VDJ!BQF
NE
,NUMBER
PIN
SYMBOL
RIN
NAME
Reset In
I/O FUNCTION
I This pin should be connected to the R
Sensor from the printer so that it is active-
low.
2,3
X"X2
External
I This is a connection to external crystal
Crystal
(Frequency: 6 MHz). Xl could also be used
Input
as input for external oscillator.
4
RESET
Reset
I The Reset signal initializes the IlPD782
When RES'ET = 0, the buffer and register
contents are:
Bus Buffer - (10M·', IOB=PSR=O)'
Column Buffer - All characters in this
buffer become 20(6)
Column Buffer Pointer - It indicates
the left side of the buffer.
5,26
40
V CC1 ·3
DC Power
These are connected to +5V power supply.
6 CS Chip
I If the Chip Select is 0 when the data bus
Select
becomes active, it enables the transfer of
data between the processor and the
IlPD782 via the data bus. If it is 1, the
data bus goes into High·lmpedance state
(inactive). However, the operation of the
printer is not affected when CS=l.
7,20
V SS1 •2
Signal
Ground
8 RD Read
I The Read Control Signal is used to read
controller status or printer status to the
host processor. When RD = 0, status infor·
mation is presented.
9 C/D Command/ I The C/D Select is used to indicate what
Data Select
kind of data is being input/output on the
data bus by the host processor. When
C/D=, in Read Operation, it is a Controller
Status and in Write Operation it gives com-
mands. When C/D=O in Read Operation it
is a Printer Status and in Write Operation
it is print data.
PIN IDENTIFICATION
456

विन्यास 11 पेज
डाउनलोड[ UPD782 Datasheet.PDF ]


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