SDA9270 Infineon Technologies Corporation, SDA9270 Datasheet - Page 8

• Manufacturer Part Number: SDA9270
• Description: Field Mixer
• Manufacturer: Infineon Technologies Corporation

Pin Description (cont’d)
Pin No.
68
69
72
73
S: supply,
2
The device generates at its output an opportune sequence of 100/120 Hz fields derived
by processing the field A and the field B which are stored in 2 external field memories
and made available to the SDA 9270 on 2 separate input ports of 16 bit width each.
The device SDA 9270 generates also control signals for the SDA 9251 which are
necessary to operate the TV - SAMs in the Frame mode, that is to write the incoming
information alternatively in one or the other field memory.
Additionally the device generates a vertical sync pulse which has to be synchronized
with the respective field output. A horizontal blanking signal in phase with the output data
is also made available.
Semiconductor Group
System Description
Name
BLN3
VS3
RENA
OEBA
I: input,
Type
Q/TTL Blanking signal / BLN2 delayed
Q/TTL Vertical synchronization signal (switched
Q/TTL RAM enable field memory A
Q/TTL Output enable port B of field memory A
Description
raster)
Q: output,
8
TTL: digital (TTL)
SDA 9270