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CL-GD62xx Dataheets PDF



Part Number CL-GD62xx
Manufacturers Cirrus Logic
Logo Cirrus Logic
Description Single DRAM LCD/VGA Controllers
Datasheet CL-GD62xx DatasheetCL-GD62xx Datasheet (PDF)

CL-GD62XX www.DataSheet4U.com ® Preliminary Data Book FEATURES s IBM®_VGA hardware-compatible s Integrated RAMDAC™ s Integrated programmable frequency synthesizer — 65 MHz at 5.0V; 40 MHz at 3.3V Single DRAM LCD/VGA Controllers for Monochrome/ Color Notebook Computers OVERVIEW The CL-GD62XX (CL-GD6205/’6215/’6225/’6235) family of advanced single-chip flat panel VGA controllers are designed for use in portable systems with stringent power consumption and form-factor requirements. Product famil.

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CL-GD62XX www.DataSheet4U.com ® Preliminary Data Book FEATURES s IBM®_VGA hardware-compatible s Integrated RAMDAC™ s Integrated programmable frequency synthesizer — 65 MHz at 5.0V; 40 MHz at 3.3V Single DRAM LCD/VGA Controllers for Monochrome/ Color Notebook Computers OVERVIEW The CL-GD62XX (CL-GD6205/’6215/’6225/’6235) family of advanced single-chip flat panel VGA controllers are designed for use in portable systems with stringent power consumption and form-factor requirements. Product family pin compatibility provides easy upgrade capability to color or higher-performance systems. Integration of the frequency synthesizer, RAMDAC, monochrome and color STN/TFT panel interfaces minimizes the form-factor requirement for color and monochrome graphics subsystems. All necessary panelpower sequencing logic has been integrated into the CL-GD62XX family, and a complete graphics subsystem can be built using only two active components (in less than three square inches). The CL-GD62XX family uses a single 256K x 16 DRAM (or four 256K x 4 DRAMs) for video memory. For added flexibility, dual-CAS*-DRAM and dual-WE*-DRAM configurations are supported. With integrated Frame-Accelerator technology, the CL-GD62XX controllers feature low-power LCD operation, yet support high LCD panel vertical-refresh rates. No additional DRAMs are required for frame (cont.) s Supports single 256K x 16 DRAM configuration — Symmetric or asymmetric RAS/CAS-address DRAM s Color STN panel support (CL-GD6225/’6235 only) — Dual-scan color STN panel support (CL-GD6235 only) — 8- and 16-bit interfaces (no extra components required) — Up to 256 simultaneous colors from a palette of 256K s Integrates color TFT panel support — Supports 9-, 12-, 15-, and 18-bit TFT panels — Up to 256 simultaneous colors from a palette of 256K s Connects directly to local bus, ISA bus (PC AT) or PI bus (CL-GD6205 connects to ISA bus only) s Windows performance-improvement features — — — — True packed-pixel addressing Improved data latches for block moves Color expansion for 8 bits-per-pixel graphics 32 x 32 hardware cursor (2 bits-per-pixel) s Supports 3.3V and 5.0V mixed-voltage operation s Standby and Suspend modes save power — Internal timers for backlight control and Standby mode — Dedicated Hardware-suspend Mode pin — 32-kHz DRAM refresh clock in Suspend mode s Frame-Accelerator for low-active power — No additional DRAMs required — Supports self-refresh DRAMs s Simultaneous CRT and LCD (SimulSCAN™) operation (cont.) Functional Block Diagram 5 256K x 16 DRAM BUS (ISA, PI, Local) 3.3V 3.3V or 5V 3.3V or 5V 4 3 2 1 0 ANALOG CRT 3.3V or 5V CL-GD62XX 160-Pin PQFP 3.3V or 5V 0 5 4 3 2 1 REFERENCE FREQUENCY MONOCHROME OR COLOR LCD PANEL October 1993 Thi d d ihF M k 404 CL-GD62XX w w w . D a t a S h e e t 4 U . c o LCD VGA Controller Family FEATURES (cont.) s 64-shade grayscale at 640 x 480 resolution on monochrome STN LCD s CRT Resolution up to 1024 x 768 with 16 colors s CRT Resolution up to 800 x 600 with 256 colors s 132-column text modes on CRTs s Automatic vertical expansion or centering option for LCD panels s 160-pin (EIAJ standard) PQFP package OVERVIEW (cont.) acceleration because the CL-GD62XX family efficiently uses the unused portions of video memory. Since the CL-GD62XX can use a 3.3V or 5.0V power supply, mixed-voltage operation is optimized for quick implementation of a notebook computer with reduced power consumption. The video memory, host bus interface, panel interface, and CRT interface each may be implemented with either 3.3V or 5.0V used in any combination. The CL-GD62XX family also offers flexibility in hostinterface connections. In addition to an ISA-bus connection, the CL-GD6215/’25/’35 can be connected directly to a PI- or local-bus to provide additional graphics performance. The 16-bit local-bus interface can be used directly with ’386SX microprocessors. Connections to 32-bit buses, such as ’386DX or ’486 microprocessors, can be made by using the 16-bit modes or with a minimum of extra components. The CL-GD62XX controllers also use the ’486 Burst mode for multiple-cycle accesses. The CL-GD62XX family offers true packed-pixel addressing, color expansion for 8-bit-per-pixel graphics, and hardware cursor, thus improving Windows performance. Other incorporated features, such as memory write buffers and internal asynchronous display data FIFOs, also boost performance. Standby and Suspend power-management modes reduce power consumption when the system is not in active use. The internal Standby Counter initiates Standby mode without software intervention. During this reduced-power mode, the LCD panel is turned off while the video memory can be accessed and modified. In Suspend mode, all I/O pins, except a dedicated Suspend Mode pin, are deactivated to further reduce power consumption. In this mode, the video memory data is preserved, but cannot be accessed; this is useful in situations when a system remains inactive for a relatively long .


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