Skip to main content
Knowledgebase
Home
Renesas Electronics America - Knowledgebase

Are there notes to ponder in switching the clock from chip oscillator?

Latest Updated:02/27/2012

Question:

Are there any notes to observe when switching to the main clock from the on-chip oscillator clock?

Answer:

Switch to the main clock from the on-chip oscillator clock under the following conditions:

  1. The main clock is oscillating stably.
  2. The CM06 bit is "1" (divide-by-8 mode).

In addition, the CM15 bit must be set to "1" (oscillation drive capability = High) until the main clock oscillates stably.

Suitable Products
M16C/62P
M16C/63
M16C/64A
M16C/64C
M16C/65
M16C/65C
M16C/6C
M16C/5L
M16C/56
M16C/5LD
M16C/56D
M16C/5M
M16C/57
M16C/29
M16C/28
M16C/26A