LC587404A/06A/08A
8. Interrupt Functions (5 sources with 4 vector addresses)
a) INT pin signal change (1 source)
b) Timer 1 (1 source)
c) Timer 2 (1 source)
d) Serial interface or SO4 pin signal change (either one)
9. Watchdog Timer
16-bit counter type. This can be reset at two different points so that it can be flexible for the application
use.
Watchdog timer operation time example
For the X’tal oscillation (32.768kHz, 1 or 2 oscillations) : 2000ms (Max)
For the CF oscillation (1MHz, 1 oscillation)
: 65.536ms (Max)
10. Sub-routine Stack
This has 8-level RAM for the use of stack. Therefore, the data RAM is not wasted when escaping to the
program counter.
11. Number of instructions
Useful instructions for the accumulator manipulation, transfer beteen the register memory, arithmetic
calculation, flag manipulation, IN/OUT port manipulation, conditional branch instructions etc are
available.
12. Oscillation Circuits (3 types)
a) 1 oscillation
One from the CF oscillation, RC oscillation or X’tal oscillation
b) 2 oscillations CF oscillation + X’tal oscillation or RC oscillation +X’tal oscillation
CF (Ceramic) Oscillation Circuit
• System Clock for the FAST mode
• 400 kHz - 4MHz
RC (Resistance, capacitor) Oscillation Circuit
• System clock for FAST mode
• 400kHz - 800kHz
• 2-pin oscillation
X’tal (Cristal) Oscillation Circuit
• System clock for SLOW mode
• 32.768kHz, 38.8993kHz,65.536kHz
13. Shipment
• QIP64E (Flat-package)
• Chip
4/17