S3C1860

1. S3C1840 S3C1840 DESCRIPTION S3C1840, a 4-bit single-chip CMOS microcontroller, consists of the reliable SMCS-51 CPU core with on-chip ROM and RAM. Eight input pins and 11 output pins provide the flexibility for various I/O requirements. Auto reset circuit generates reset pulse every certain period, and every halt mode termination time. The S3C1840 microcontroller has been designed for use in small system control applications that require a low-power, cost sensitive design solution. In addition, the S3C1840 has been optimized for remote control transmitter. FEATURES ROM Size 1,024 bytes Four Transmission Frequencies fxx/12 (1/4 duty), fxx/12 (1/3 duty), fxx/8 (1/2 duty), and no-carrier frequency RAM Size 32 nibbles Supply Voltage 1.8 V-3.6 V (250 kHz ≤ f OSC ≤ 3.9 MHz) 2.2 V-3.6 V (3.9 MHz < fOSC ≤ 6 MHz) Instruction Set 39 instructions Power Consumption Instruction Cycle Time 13.2 µsec at fxx = 455 kHz Halt mode: 1 µA (maxium) Normal mode: 0.5 mA (typical) Input Ports Two 4-bit ports (24 pins)/one 4-bit port, one 2-bit ports (20 pins) Operating temperature – 20 °C to 85 °C Package Type Output Ports One 4-bit port, seven 1-bit ports (24 pins)/one 4bit port, five1-bit ports (20 pins) 24 SOP, 20 DIP, 20 SOP Oscillator Frequency divide select Mask Option: fxx = fOSC or fOSC/8 Built-in Oscillator Crystal/ceramic resonator Built-in Reset Circuit Built-in Power-on reset and auto reset circuit for generating reset pulse every 131072/fxx (28...