M16C26 Datasheet, PDF (34/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative
Clock Generating Circuit
and
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
Clock Generating Circuit
The clock generating circuit contains three oscillator circuits as follows:
(1) Main clock generating circuit
(2) Sub clock generating circuit
(3) Ring oscillator
Table 1.8.1 lists the clock generating circuit specifications.
Table 1.8.1. Clock generating circuits
Example of oscillator circuit
Item
Main clock
generating circuit
Sub clock
generating circuit
Ring oscillator
Use of clock
Usable oscillator
- CPU's operating
clock source
- Internal peripheral
unit's operating
- Ceramic oscillator
- Crystal oscillator
- CPU's operating - CPU clock source
clock source
- Peripheral function
- Timer A/B's count
clock source
clock source
- CPU and peripheral
function clock source
when main clock
frequency stops
- Crystal oscillator About 1MHz
Pins to connect XIN, XOUT
oscillator
XCIN, XCOUT
Oscillation stop/ Available
restart function
Available
Oscillator status Oscillating
after reset
Stopped
Other
Externally derived clock can be input
Available
Stopped
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