R8A77800BNBGV General Description
With the R8A77800BNBGV product, cutting-edge technology takes center stage, featuring the SH-4A CPU core that can operate at a maximum frequency of 400MHz. The inclusion of a four-way set-associative cache memory, split into separate 32-Kbyte segments for instructions and data, ensures smooth and efficient data processing. Moreover, the SH7780 comes equipped with an on-chip 32-bit PCI bus controller, allowing seamless connections with LSI devices supporting PCI interfaces at 66 MHz or 33 MHz. Its support for various bus types, including connections to DDR-SDRAM and PCI devices, makes this product a versatile and high-performance solution for a wide range of applications
Key Features
This LSI is a single-chip RISC microprocessor that integrates a 32-bit RISC-type Super H architecture CPU with a digital signal processing (DSP) extension as its core, together with a large-capacity 32-kbyte cache memory, a 16-kbyte X/Y memory, and an interrupt controller. High-speed data transfers can be performed by an on-chip direct memory access controller (DMAC), and an external memory access support function enables direct connection to different kinds of memory. This LSI also supports a stereo audio recording and playback function, a USB host controller, a function controller, an LCD controller, a PCMCIA interface, an A/D converter, and a D/A converter.
The USB host controller and LCD controller have bus master functions, so that data supplied from an external memory (area 3) can be freely processed. Since the USB host controller, in particular, conforms to Open HCI standards, it is extremely easy to transfer data from the PC of a device driver or other devices. Also, low-power operation suitable for battery operation is possible because the LCD controller continues to display even in sleep mode.
A powerful built-in power management function keeps power consumption low, even during high speed operation. This LSI is ideal for electronics devices, which require both high speed and low power consumption.
The SH7720 group integrates an SSL (Secure Socket Layer) accelerator that performs RSA (Rivest-Shamir-Adleman) operations and DES (Data Encryption Standard) and Triple-DES encryption/decryption, while the SH7721 group does not have the SSL accelerator. Each group consists of several models which includes or does not include an SD host interface (SDHI) to be suited to a variety of applications. See table 1.2 and 1.3, Product Lineup, for the models including (or not including) the SDHI.
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