Wattanavichean K, Khangumnerd A. Design and Testing of Asic Chip for Microprocessors Interfacing in a Digital PABX System. Agr. Nat. Resour. [internet]. 1998 Dec. 31 [cited 2026 Sep. 17];32(4):473-84. available from: https://li01.tci-thaijo.org/index.php/anres/article/view/240603