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SAA5250 Fiches technique(PDF) 5 Page - NXP Semiconductors

No de pièce SAA5250
Description  Interface for data acquisition and control for multi-standard teletext systems
Download  35 Pages
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SAA5250 Fiches technique(HTML) 5 Page - NXP Semiconductors

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January 1987
5
Philips Semiconductors
Product specification
Interface for data acquisition and control
(for multi-standard teletext systems)
SAA5250
PINNING FUNCTION
MNEMONIC
PIN NO.
FUNCTION
A10 and
A0 to A9
1 and
30 to 39
Memory address outputs used by CIDAC to address a 2 K byte buffer memory
VAL OUT
2
Validation output signal used to control the location of the window for the framing code.
VAL IN/SYNC
3
Validation input signal (line signal) used to give or calculate a window for the framing
code detection
CBB
4
Colour burst blanking output signal used by the SAA5230 as a data slicer reset pulse
DCK
5
Data clock input, in synchronization with the serial data signal
SD
6
Serial data input, arriving from the demodulator
MS
7
Chip enable output signal for buffer memory selection
WE
8
Write command output for the buffer memory
DB7 to DB0
9 to 16
8-bit three state input/output data/address bus used to transfer commands, data and
status between the CIDAC registers and the CPU
ALE
17
Demultiplexing input signal for the CPU data bus
CE
18
Chip enable input for the SAA5250
WR
19
Write command input (when LOW)
VSS
20
ground
RD
21
Read command input (when LOW)
D0 to D7
22 to 29
8-bit three state input/output data bus used to transfer data between CIDAC and the
buffer memory
VDD
40
+5 V power supply


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