¡ Semiconductor
ML63187/63189B
• Power supply backup
Backup circuit (voltage multiplier) enables operation at 0.9 V minimum
• Timers and counter
8-bit timer ¥ 4
Selectable as auto-reload mode/capture mode/clock frequency measurement mode
Watchdog timer ¥ 1
100 Hz timer ¥ 1
Measurable in steps of 1/100 sec.
15-bit time base counter ¥ 1
1, 2, 4, 8, 16, 32, 64, and 128 Hz signals can be read
• Shift register
Shift clock
: 1 ¥ or 1/2 ¥ system clock, timer 1 overflow,
external clock
: 8 bits
Data length
• Interrupt sources
ML63187
External interrupt
Internal interrupt
: 2
: 12 (watchdog timer interrupt is a nonmask-
able interrupt)
ML63189B
External interrupt
Internal interrupt
: 3
: 12 (watchdog timer interrupt is a nonmask-
able interrupt)
• Operating temperature
–20 to +70°C
• Operating voltage
When backup used
: 0.9 to 2.7 V
(Operating frequency: 30 to 80 kHz)
1.2 to 2.7 V
(Operating frequency: 300 to 500 kHz)
1.5 to 2.7 V
(Operating frequency: 200 kHz to 1 MHz)
: 1.8 to 5.5 V
When backup not used
• Package:
(Operating frequency: 200 kHz to 2 MHz)
128-pin plastic QFP (QFP128-P-1420-0.50-K) : (Product name: ML63187-xxxGA,
ML63189B-xxxGA)
Chip
: ML63187-xxx, ML63189B-xxx
xxx indicates a code number.
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OKI [ OKI ELECTRONIC COMPONETS ]
