SCG9800

www.DataSheet4U.com SCG9800 8-BIT MICROCONTROLLER SCG9800 Microcontroller Specification FEATURE SUMMARY Technology − CMOS technology. I/O Ports − − 1 8-bit programmable I/O port. 1 2-bit output port. CPU − − 8-bit CPU core. 128 powerful and easy-to-use instruction set. Timer − − − 2 8-bit pre-scalar auto reload timers which can be cascaded to form one 16-bit timer. 1 real time timer. 1 watch dog timer. Memory − − − Internal RAM: 240 x 8 Memory is organized as 16K-byte page. External memory access of up to 1M x 8, can be both ROM and RAM. Operating Voltage − 2.4V to 5.5V. I/O Structure − Memory mapped I/O structure. Oscillation Frequency − − RC Oscillator for the main system clock up to 4MHz, instruction cycle ~0.5us. Subsystem clock frequency of 32.768kHz for real time timer. Power Down − − Stop mode (stop main and subsystem clock to core) Sleep mode (stop main system clock only) Interrupts − − − − 2 timer interrupts. 1 real time interrupt. 1 external event interrupt. 1 software interrupt. Score Concept Semiconductor Ltd. 1 Sept 2000 SCG9800 8-BIT MICROCONTROLLER FUNCTION OVERVIEW Program Memory Map RAM Area: Address $00-$0F $10-$FF Description H/W registers and I/Os Data memory and Stack Figure 1. Memory map in RAM area External ROM Area: Physical Address $0000-$3FFF Page 0 Program Reset address at $0000 $4000-$7FFF $8000-$BFFF $C000-$FFFF Page 1 Page 2 Page 3 Software interrupt at $FFC0 External interrupt at $FFD0 Timer 1 interrupt at $FFE0 Timer 0/RTC ...