Datasheet

Section 1 Overview
Rev. 8.00 Mar. 09, 2010 Page 3 of 658
REJ09B0042-0800
Item Specification
Clock pulse
generators
Two on-chip clock pulse generators
• System clock pulse generator:
1.0 to 16 MHz: H8/38024 Group
1.0 to 10 MHz: HD64F38024, HD64F38024R, and H8/38024S Group
2.0 to 20 MHz: H8/38124 Group
• Subclock pulse generator:
32.768 kHz, 38.4 kHz* (* does not apply to H8/38124 Group)
H8/38124 Group equipped with on-chip oscillator
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
• H8/38024, H8/38024S, and H8/38124: 32-Kbyte ROM, 1-Kbyte RAM
• H8/38023, H8/38023S, and H8/38123: 24-Kbyte ROM, 1-Kbyte RAM
• H8/38022, H8/38022S, and H8/38122: 16-Kbyte ROM, 1-Kbyte RAM
• H8/38021, H8/38021S, and H8/38121: 12-Kbyte ROM, 512 byte RAM
• H8/38020, H8/38020S, and H8/38120: 8-Kbyte ROM, 512 byte RAM
I/O ports 66 pins
• 51 I/O pins (50 pins on H8/38124 Group)
• 9 input pins
• 6 output pins