Title :
A CMOS 510 K-transistor single-chip token-ring LAN controller (TRC) compatible with IEEE802.5 MAC protocol
Author :
Kanuma, Akira ; Yaguchi, Toshiyuki ; Tanaka, Koichi ; Katsumata, Eiichi ; Fujimoto, Katsuhito ; Miyazawa, Yuuichi ; Iida, Shin-Ichi ; Yamamoto, Tetsuya
Author_Institution :
Toshiba Corp., Kawasaki, Japan
fDate :
2/1/1990 12:00:00 AM
Abstract :
The token-ring controller (TRC) consists of five functional blocks. they are a dedicated 16-b microprocessor which includes 11 K-word×20-b protocol firmware ROM, finite-state machines for real-time handling of frames, an 896-word×16-b dual-port RAM for frame buffer FIFOs and working memory (FIFO/RAM), a host processor bus interface, and a three-channel DMA controller which can follow list structure frame buffers. The TRC interprets and executes 16 types of commands and handles 23 types of media access control (MAC) frames. It can continuously receive more than 90% of incoming packets with 64-byte information length at 40 Mbit/s network speed. It is fabricated with double-metal-layer 1.2-μm CMOS technology and integrates 510 K MOSFETs in a 14.49-mm×14.62-mm chip area. The maximum power consumption is 0.945 W at 8-MHz operating frequency and 5-V±5% power supply low-power systems but also for high-performance applications
Keywords :
CMOS integrated circuits; VLSI; digital signal processing chips; integrated circuit technology; protocols; read-only storage; token networks; 0.945 W; 1.2 micron; 14.49 to 14.62 mm; 14336 bit; 16 bit; 20 bit; 220 Kbit; 4 Mbit/s; 5 V; 8 MHz; CMOS; IEEE802.5 MAC protocol; TRC; VLSI; chip area; double metal layer chips; dual-port RAM; finite-state machines; frame buffer FIFOs; functional blocks; high-performance applications; host processor bus interface; media access control; microprocessor; network speed; operating frequency; power consumption; power supply low-power systems; protocol firmware ROM; single-chip token-ring LAN controller; three-channel DMA controller; token-ring controller; working memory; CMOS technology; Energy consumption; Local area networks; MOSFETs; Media Access Protocol; Microprocessors; Microprogramming; Random access memory; Read only memory; Read-write memory;
Journal_Title :
Solid-State Circuits, IEEE Journal of
