SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 410

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

Figure 21-4 Clock Switching State Machine
Table 21-3
State
Number
1
2
3
4
5
1)
User’s Manual
The indicated PLL status applies only if the PLL is selected as the basic clock source. If the basic clock source
is direct drive or prescaler, the PLL will not lock. If the oscillator watchdog is disabled (OWDDIS = ‘1’) the PLL
will be off.
PLL
Status
Locked
Locked
Transient
Transient
Off
Clock Switching State Description
Reset
1)
1)
1
3
1)
1)
f
Source
Basic
SDD
SDD
SDD
SDD
CPU
xx
State Transition when writing "xx" to CLKCON.
Automatic Transition after clock is stable,
i.e. CLKLOCK = '1'.
CLK
CON
00
01
(00)
(01)
10
01
00
01
00
5
21-14
Note
Standard operation on basic clock frequency.
SDD operation with PLL On
delay) or manual switch back (from 5) to
basic clock frequency.
Intermediate state leading to state 1.
Intermediate state leading to state 2.
SDD operation with PLL Off.
Reduced power consumption.
2
4
MCA04478
Power Management
C164CM/C164SM
1)
. Fast (without
Derivatives
V1.0, 2002-02