The MB91301 series is a line of microcontrollers based on a 32-bit RISC CPU core (FR family), incorporating a variety of I/O resources and a bus control mechanism for embedded control that requires the processing of a high-performance, fast CPU as well as an SDRAM interface that can connect SDRAM directly to the chip. The large address space supported by the 32-bit CPU addressing means that operation is primarily based on external bus access although instruction cache memory of 4 Kbytes and RAM of 4 Kbytes( for data) are included for high-speed execution of CPU instructions. The MB91302A and MB91V301A are FR60 products based on the FR30/40 CPU with enhanced bus access for higher speed operation. The device specifications include a D/A converter to facilitate motor control and are ideal for use in DVD players that support fly-by transfer.
The MB91301 Series are 32‑bit RISC microcontrollers from Fujitsu, featuring an FR family CPU core, on‑chip ROM, RAM, and a range of peripheral interfaces. The devices target embedded control applications such as DVD players and industrial equipment, offering high‑speed operation and an SDRAM interface.
Key sections cover the CPU architecture, bus interface, built‑in memory, DMA controller, UART, A/D converter, timer modules, power supply details, pin‑out tables, and mechanical dimensions. Legal and export notices conclude the document.
| CPU core | 32‑bit RISC (FR family) |
|---|---|
| Maximum internal operating frequency | 68 MHz |
| Data RAM | 4 Kbytes |
| Instruction cache size | 4 Kbytes |
| DMA controller channels | 5 channels (2 external‑to‑external) |
| A/D converter resolution | 10‑bit, 4 channels |
| UART type | Full duplex, double buffer |
| Power supply (analog) | 3.3 V + 0.3 V (internal regulator) |
The MB91301 series operates up to 68 MHz internal frequency.
The MB91302A includes 4 Kbytes of data RAM.
The integrated A/D converter offers 10‑bit resolution with four channels.
The DMA controller provides five channels, including two external‑to‑external channels.