HD6473847RHV Datasheet, PDF (141/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 4 Clock Pulse Generators
4.6.5 Notes on H8/38104 Group
When using the on-chip emulator, system clock precision is necessary for programming or erasing
the flash memory. However, the on-chip oscillator frequency can vary due to changes in
conditions such as voltage or temperature. Consequently, when using the on-chip emulator, pins
OSC1 and OSC2 should be connected to an oscillator, or an external clock should be supplied, if
the on-chip oscillator is selected. In this case, the LSI uses the on-chip oscillator when user
programs are being executed and the system clock oscillator when programming or erasing flash
memory. The process is controlled by the on-chip emulator.
Rev. 7.00 Mar. 08, 2010 Page 109 of 510
REJ09B0024-0700