Philips Semiconductors
PANorama-IC (PAN-IC)
Preliminary specification
SAA4995WP
FEATURES
• Horizontal sample rate conversion in both zoom and
compress direction, with a sample rate conversion factor
between 0.5 and 2 (in 384 steps)
• Dynamic sample rate conversion for panorama mode
display e.g. 4 : 3 material on a 16 : 9 display
• Dynamic sample rate conversion for amaronap mode
display of e.g. 16 : 9 material on a 4 : 3 display
• Operates with 1fh and 2fh
• Programmable via microcontroller SNERT
(Synchronous No parity Eight bit Receive Transmit) bus.
GENERAL DESCRIPTION
The PAN-IC is an add-on IC to be used, for example,
between analog-to-digital conversion and a serial (field)
memory. The device performs the following tasks:
• Linear horizontal sample rate conversion in both zoom
and compress direction, with a sample rate conversion
factor between 0.5 and 2
• Dynamic sample rate conversion for panorama mode
display of e.g. 4 : 3 material on a 16 : 9 display
• Dynamic sample rate conversion for amaronap mode
display of e.g. 16 : 9 material on a 4 : 3 display.
The PAN-IC has the ability to increase the data rate from
the ADC to a maximum of twice the data rate at the output.
To achieve this a clock rate at twice the normal output
clock rate is needed to write data to the memory.
All actions to generate a lower data rate, produces disable
cycles in Write Enable (WE).
QUICK REFERENCE DATA
SYMBOL
VDD
IDD
fCLK
Tamb
PARAMETER
supply voltage
supply current
operating clock frequency
operating ambient temperature
MIN.
4.5
−
−
0
TYP.
5
110
−
−
MAX.
5.5
−
33
70
UNIT
V
mA
MHz
°C
ORDERING INFORMATION
TYPE NUMBER
SAA4995WP
PACKAGE
NAME
DESCRIPTION
PLCC44 plastic leaded chip carrier; 44 leads
VERSION
SOT187-2
1997 Jun 10
2