Toshiba’s TX4964FG was a 2007 system-on-chip designed to drive automotive TFT displays, including instrument clusters and rear-view camera screens. It combined a CPU, graphics hardware, display control, camera input and 4 MB of embedded DRAM in one package, replacing four separate ICs in the system described at launch.
What was Toshiba’s automotive display SoC?
The TX4964FG was an automotive graphics-display SoC announced in 2007. Electronic Design reported on July 5, 2007, that Toshiba targeted it at displays ranging from backup-camera views to reconfigurable instrument clusters. It was intended to drive and manage small TFT-LCD panels in medium- and high-end vehicles, typically three to five inches and up to VGA resolution.
The design addressed a practical system problem: a vehicle display needed processing, graphics, panel control, camera handling and memory, often spread across several chips. Toshiba integrated those functions to reduce component count, board area, power needs and system complexity. The claim that it replaced four ICs describes the integration in the system coverage; it is not a guarantee that every vehicle design could eliminate exactly four components.
What did the TX4964FG integrate?
- CPU: Toshiba’s MIPS-based TX49/L4 64-bit processor, running at 120 MHz.
- Graphics: A hardware graphics engine with cluster-oriented graphics support for up to 32-bit RGBA color, plus an accelerator for display output and anti-aliasing.
- TFT-LCD control: A panel controller to manage display output.
- Camera input: A digital-camera interface and frame grabber that handled multiple input formats, including rear-view monitoring use cases.
- Memory: 4 MB of embedded DRAM for frame-buffer use, eliminating the need for external RAM ICs in the described design.
- Package: A 176-pin QFP.
That combination made the TX4964FG a display-processing device, not simply a video-interface converter. Its processing and graphics capabilities were intended to support instrument-cluster rendering as well as camera-display functions.
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TX4964FG specifications at a glance
| Specification | Published TX4964FG detail |
|---|---|
| CPU | MIPS-based Toshiba TX49/L4, 64-bit |
| CPU clock | 120 MHz |
| Embedded memory | 4 MB DRAM for frame-buffer use |
| Graphics | Up to 32-bit RGBA color; graphics hardware and display-output/anti-aliasing acceleration |
| Display target | Typically 3–5-inch TFT-LCD panels, up to VGA resolution, according to 2007 coverage |
| Camera function | Digital-camera interface and frame grabber supporting multiple input formats |
| Package | 176-pin QFP |
| IC integration claim | Four ICs replaced in the described integration, according to Electronic Design’s 2007 coverage |
How the later Toshiba bridge chips differ
Toshiba announced automotive infotainment (IVI) video-interface bridge devices in 2018 and 2020. These products address connectivity between video standards rather than integrating the CPU, graphics engine, framebuffer and display-processing functions described for the TX4964FG. A bridge can translate a compatible input into a different display or camera interface; it is not a later version of the TX4964FG.
| Device or family | Function and published formats | Published resolution | Package and temperature information | Launch timing stated by Toshiba |
|---|---|---|---|---|
| TX4964FG (2007) | Integrated compute, graphics, TFT control, camera input and frame-buffer memory for cluster and rear-view display systems | Up to VGA for the typically 3–5-inch displays described in 2007 coverage | 176-pin QFP; temperature range not stated in Electronic Design’s 2007 coverage | Introduced in 2007; sample timing not stated in the cited coverage |
| TC9590 (2018) | HDMI 1.4a input to four-lane MIPI CSI-2 output | Not stated in Toshiba’s June 4, 2018 announcement | Compact VFBGA/LFBGA package family; individual package dimensions and temperature range not stated in the announcement | Toshiba said samples would ship from June 2018 |
| TC9591 (2018) | 24-bit parallel video to four-lane MIPI CSI-2 | Not stated in Toshiba’s June 4, 2018 announcement | Compact VFBGA/LFBGA package family; TC9591XBG operating range extended to +105°C; lower limit not stated in the announcement | Toshiba said samples would ship from June 2018 |
| TC9592 (2018) | MIPI DSI to single-link LVDS | UXGA, 1600 × 1200, 24-bit | Compact VFBGA/LFBGA package family; individual package dimensions and temperature range not stated in the announcement | Toshiba said samples would ship from June 2018 |
| TC9593 (2018) | MIPI DSI to dual-link LVDS | Up to WUXGA, 1920 × 1200 | Compact VFBGA/LFBGA package family; individual package dimensions and temperature range not stated in the announcement | Toshiba said samples would ship from June 2018 |
| TC9594XBG (2020) | 24-bit parallel input to four-lane MIPI DSI | WUXGA, 1900 × 1200, at 24-bit, as stated in Toshiba’s June 2, 2020 announcement | 7 × 7 mm, 0.65 mm-pitch VFBGA80; −40°C to +105°C | Toshiba said samples had begun shipping in May 2020 |
| TC9595XBG (2020) | MIPI DSI or DPI input to VESA DisplayPort 1.1a output | WUXGA, 1900 × 1200, at 24-bit, as stated in Toshiba’s June 2, 2020 announcement | 7 × 7 mm, 0.65 mm-pitch VFBGA80; −40°C to +85°C | Toshiba said samples would follow later in 2020 |
The table reflects the capabilities and timing published in the cited launch announcements, not present-day stock or lifecycle status. For the 2020 devices, Toshiba’s stated WUXGA figure is 1900 × 1200; the 2018 TC9593 announcement gives 1920 × 1200.
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Which Toshiba chip drives an automotive TFT instrument cluster?
Among the products covered here, the TX4964FG is the chip specifically described as an integrated processor and graphics SoC for instrument-cluster and rear-view display systems. The TC9590–TC9593 and TC9594XBG/TC9595XBG are bridge ICs announced for automotive IVI connectivity, with defined video-interface conversion paths. Their different roles matter when selecting a part: a bridge handles format conversion, while the TX4964FG’s announced feature set also included compute, graphics and frame-buffer memory.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the announcements do—and do not—establish
The 2007 coverage and Toshiba’s 2018 and 2020 announcements establish the devices’ announced functions, selected specifications and sample-shipment timing. They do not establish that these parts remain in production, are suitable for a particular current vehicle program, or are available from a distributor today. Engineers evaluating one should verify lifecycle status, complete datasheets, automotive qualification details, interface compatibility and supply directly with Toshiba or an authorized supplier.
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