BT457 Datasheet
BT457 Datasheet (Conexant Systems)
Conexant Systems
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w w w The Bt457 and Bt458 are pin- and software-compatible RAMDACs designed specifically for high-performance, high-resolution color graphics. The architecture enables a display of 1280 x 1024 bit-mapped color graphics (up to 8 bits per pixel plus up to 2 bits of overlay information). This minimizes.
BT457 Datasheet (Brooktree)
Brooktree
Pin Descriptions The Bt4978 is available in both 84-pin Plastic Leaded Chip Carrier (PLCC) and Ceramic PGA packages, as illustrated in Figure 1 and 2. Pin descriptions are provided in Table 1. Pin la.
include programmable blink rates, bit plane masking and blinking, color overlay capability, and a dual-port color palette RAM.
Functional Block Diagram
CLOCK* CLOCK
VAA
GND
FSADJUST VREF
Distinguishing Features
* 165, 135, 125, 110, 80 MHz operation
* 4:1 or 5:1 input mux
* 256-word dual-port .