SCG9832 Datasheet PDF - ETC
| Part Number | SCG9832 | |
| Description | Microcontroller Specification | |
| Manufacturers | ETC | |
| Logo |  |
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There is a preview and SCG9832 download ( pdf file ) link at the bottom of this page. Total 27 Pages | ||
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SCG9832
8-BIT MICROCONTROLLER
SCG9832 Microcontroller Specification
FEATURE SUMMARY
Technology
− CMOS technology.
CPU
−
−
8-bit CPU core.
126 powerful and easy-to-use
instruction set
Memory
− Internal ROM: 32K x 8
− Internal RAM: 128 x 8
− Memory is organized as 16K-byte
page.
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 oscillation)
Interrupts
− 2 timer interrupts.
− 1 real time interrupt.
− 1 external event interrupt.
− 1 software interrupt.
I/O ports
− 2 8-bit programmable I/O ports.
− 1 7-bit output port.
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.
Operating Voltage
− 2.4V to 5.5V.
Score Concept Semiconductor Ltd.
1
Sept 2000
|
| |
 
SCG9832
8-BIT MICROCONTROLLER
Memory
Interrupt Mask Flag (I)
The flag will be set to 1 when entering an interrupt service routine. By that time,
all other interrupt events will be pending.
After exiting from the interrupt service routine, this interrupt mask flag will be
cleared to 0. Then interrupt handling will be resumed.
There are 32K bytes internal ROM with each page size is 16K bytes. Besides, an extra 64 bytes
area are for interrupt vector addressing space. Regarding the instruction pointer, it is organized
as iPAGE:PC for instruction fetch.
Change of program flow between pages is by modifying the PAGE register and then followed by
executing a JMP or CALL instruction. These two instructions will load the PAGE register to
iPAGE and change the content in PC for long JMP or CALL instruction. It does not need to
change the PAGE register if it is a short JMP/CALL (JMP/CALL within page) because the PAGE
register is normally the same as the iPAGE register. To exit a subroutine, long or short return
type must be specified for long or short CALL respectively.
The microcontroller has 128 bytes internal RAM data storage of address $80-$FF. This area
includes stack frame and data memory. The stack frame is usually initialized at the highest RAM
address location, i.e. $FF.
Oscillation Circuits
Main system and subsystem oscillation circuitry generates the internal clock signal for the CPU
and other hardware timings. The main system clock uses the RC oscillation source. The
operating frequency is up to 4 MHz. This clock is for CPU and the two timers.
The subsystem clock is for the real time signals. It uses 32.768 kHz crystal. It has to be tied to a
voltage level, either HIGH or LOW, if the real time timer and the watch dog timer are not used.
Power Down
The microcontroller supports power down mode for saving power.
Executing a STOP instruction will stop the main system oscillation to save most of
microcontroller power.
Only an external interrupt will release the microcontroller from STOP mode.
Interrupts
The MICROCONTROLLER has 2 timer interrupts, one real time interrupt, one external event
interrupt and one software interrupt. When interrupt occurs, the content of PC, iPAGE and PS
are pushed onto the stack in sequence. And then, the corresponding interrupt vector is loaded
into iPAGE:PC. Upon executing a RTI instruction, the registers are popped out of the stack in the
reversed order.
The preference of interrupt priority is Timer 0 / RTC interrupt, Timer 1 interrupt and then external
interrupt.
Score Concept Semiconductor Ltd.
5
Sept 2000
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SCG9832 electronic component. |
| Information | Total 27 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ SCG9832.PDF Datasheet ] | |
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