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R6 R5 R4 R3 R2 Rl Kl TTTT SWl SW2 SW3 SW4 K8 INIT OSC OSC R7 R8 R9 RIO VDD VSS Figure 2: Block diagram of the ... RTC-4 real-time controller, showing the TMS1121C 4-bit microcomputer and its associated user-interface components. ... X RO 00 01 02 03 04 05 06 07 DRIVER +9V Timer Controller. ... The RTC-4 contains additional circuitry necessary to interface the chip to the real world. ... The 20-key keypad enables you to enter instructions and data into the TMS1121.
Publisher: - 1983


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