上海辰祥电子科技有限公司 联系人 ：周平 13917885749 GENERAL DESCRIPTION TM87R04 is a Mask ROM embedded high-performance 4-bit micro controller with LCD driver. FEATURE 1. Powerful instruction set (100 instructions) ?? Binary addition, subtraction, BCD adjusts, logical operation in direct and index addressing mode ?? Single-bit manipulation (set, reset, decision for branch) ?? Various conditional branches ?? 16 working registers and manipulation ?? LCD driver data transfer 2. Memory capacity ?? Program ROM capacity 8186 x 8 bits ?? Data RAM capacity 128 x 4 bits 3. Input/output ports ?? Port IOA 4 pins (with internal pull-low) ?? Port IOB 2 pins (with internal pull-low) ?? Port IOC 4 pins (with internal pull-low, chattering prevention clock) ?? Port IOD 4 pins (with internal pull-low) 4. 8 level subroutine nesting 5. Interrupt function ?? External factor 2 (INT pin, Port IOC) ?? Internal factor 3 (Pre-Divider, Timer1, Timer2)