Philips Semiconductors
Memory controller
Preliminary specification
SAA4951
FEATURES
• Support for acquisition, display and deflection PLL
• 50/100 (or 60/120) Hz scan conversion for different input
data rates: 12, 13.5, 16 and 18 MHz
• Support for 4:3 and 14:9 display on a 16:9 screen
(horizontal compression)
• Support for Y:U:V data rates of 4:1:1, 4:2:2, and 4:4:4
• Horizontal zoom
• Still picture
• Support for one or two field memories
• Support for different video memory types like
TMS 1050/60/70/2970
• Progressive scan
• Programmable via microcontroller port
• Golden Scart option
• Support for Multi-PIP.
GENERAL DESCRIPTION
The memory controller SAA4951 has been designed for
high end TV sets using 2fH-technics.
The circuit provides all necessary write, read and clock
pulses to control different field memory concepts.
Furthermore the drive signals for the horizontal and
vertical deflection power stages are generated.
The device is connected to a microcontroller via an 8-bit
data bus. The controller receives commands via the
I2C-bus. Due to this fact the start and stop conditions of the
main output control signals are programmable and the
SAA4951 can be set in different function modes
depending on the used TV-feature concept.
QUICK REFERENCE DATA
SYMBOL
VDD
IDD
Tamb
PARAMETER
supply voltage
supply current
operating ambient
temperature
MIN.
4.5
−
0
TYP.
5.0
50
−
MAX.
5.5
−
+70
UNIT
V
mA
°C
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
PINS
SAA4951WP
44
Note
1. SOT187-2; 1996 December 13.
PIN
POSITION
PLCC
PACKAGE
MATERIAL
plastic
CODE
SOT187(1)
April 1994
2