
Table 1-1 Features (cont)
Item
Description
Interrupts
36 interrupt sources
• 13 external interrupt sources (IRQ
4
to IRQ
0
, WKP
7
to WKP
0
)
• 23 internal interrupt sources
Clock pulse generators Two on-chip clock pulse generators
• System clock pulse generator: 0.4 to 6 MHz
• Subclock pulse generator: 32.768 kHz, 38.4 kHz
Power-down modes
Seven power-down modes
• Sleep (high-speed) mode
• Sleep (medium-speed) mode
• Standby mode
• Watch mode
• Subsleep mode
• Subactive mode
• Active (medium-speed) mode
Memory
Large on-chip memory
• H8/3862, H8/3822: 16-kbyte ROM, 1-kbyte RAM
• H8/3863, H8/3823: 24-kbyte ROM, 1-kbyte RAM
• H8/3864, H8/3824: 32-kbyte ROM, 2-kbyte RAM
• H8/3865, H8/3825: 40-kbyte ROM, 2-kbyte RAM
• H8/3866, H8/3826: 48-kbyte ROM, 2-kbyte RAM
• H8/3867, H8/3827: 60-kbyte ROM, 2-kbyte RAM
I/O ports
64 pins
• 55 I/O pins
• 9 input pins
Timers
Six on-chip timers
• Timer A: 8-bit timer
Count-up timer with selection of eight internal clock signals divided from
the system clock (ø)
*
and four clock signals divided from the watch clock
(ø
w
)
*
• Asynchronous event counter: 16-bit timer
— Count-up timer able to count asynchronous external events
independently of the MCU's internal clocks
Note:
*
See section 4, Clock Pulse Generator, for the definition of ø and ø
w
.
2