saa6712e NXP Semiconductors, saa6712e Datasheet - Page 16

• Manufacturer Part Number: saa6712e
• Description: Xga Rgb To Tft Graphics Engine
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 2 SDRAM channel configurations
Note
1. 36 MHz clock frequency.
7.5.2
SGRAM devices organized to 256k
and feature the wide data bus for high speed applications.
With these devices a frame buffer can be built, without
wasting memory because of bandwidth. In case of
SGRAM usage, the memory data bus of the SAA6712E
can be split into 2 channels of 32 bits each.
Table 3 SGRAM channel configurations
Note
1. 36 MHz clock frequency.
1999 Aug 25
Panel
XGA
Panel
XGA
RESOLUTION
RESOLUTION
XGA RGB to TFT graphics engine
INPUT
INPUT
(1)
(1)
SGRAM
2 Mbits frame buffer needed
288 Mbits/s
bandwidth;
2
2
2 Mbits frame buffer needed
288 Mbits/s
bandwidth;
1
1
MEMORY CONFIGURATION
HSC or
MSC
HSC or
MSC
60 Hz
60 Hz
SVGA (800
SVGA (800
319 Mbits/s
bandwidth;
2
2
319 Mbits/s
bandwidth;
1
1
32 bits are available,
600)
HSC or
MSC
600)
HSC or
MSC
75 Hz
75 Hz
3 Mbits frame buffer needed
411 Mbits/s
bandwidth;
2
3
3 Mbits frame buffer needed
411 Mbits/s
bandwidth;
1
2
HSC or
MSC
HSC or
MSC
60 Hz
60 Hz
16
XGA (1024
XGA (1024
Each channel gives, in HSC mode with 125 MHz clock
frequency, an effective bandwidth of 456 Mbits/s; and in
MSC mode, with 100 MHz clock speed, an effective
bandwidth of 364 Mbits/s.
Table 3 gives the channel configuration for several input
and panel resolutions.
452 Mbits/s
bandwidth;
2
3
452 Mbits/s
bandwidth;
1
2
HSC or
MSC
HSC or
MSC
768)
768)
75 Hz
75 Hz
4 Mbits frame buffer needed
475 Mbits/s
bandwidth;
3
3
4 Mbits frame buffer needed
475 Mbits/s
bandwidth;
2
2
HSC or
MSC
HSC or
MSC
60 Hz
60 Hz
SXGA (1280
SXGA (1280
Preliminary specification
SAA6712E
540 Mbits/s
bandwidth;
3
3
540 Mbits/s
bandwidth;
2
2
HSC or
MSC
HSC or
MSC
1024)
1024)
75 Hz
75 Hz