Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 293
CHAPTER 17 CLOCK SUPERVISOR COUNTER
17.3 Operations
17.3 Operations
This section describes the operations of the clock supervisor counter.
■ Clock Supervisor Counter
● Clock Supervisor Counter Operation 1
The clock supervisor counter is first enabled by the software (CMCEN = 1), and then the clock
supervisor counter operates with the time-base timer interval selected from eight options by the
TBTSEL[2:0] bits. Between two rising edges of the time-base timer interval selected, the
internal counter is clocked by the external clock.
The count clock of this module can be selected from the main oscillation clock and the
suboscillation clock.
Figure 17.3-1 Clock Supervisor Counter Operation 1
● Clock Supervisor Counter Operation 2
The CMDR register is cleared when the CMCEN bit changes from "0" to "1".
Figure 17.3-2 Clock Supervisor Counter Operation 2
Selected time-base
timer interval
Main/Sub-oscillation clock
CMCEN
Internal counter
CMDR register
0
0 30
30
Selected time-base
timer interval
Main/Sub-oscillation clock
CMCEN
Internal counter
CMDR register
Clear
00
0010
10 10
10

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English