ST92141 STMicroelectronics, ST92141 Datasheet - Page 71

• Manufacturer Part Number: ST92141
• Description: 8/16-bit Mcu For 3-phase Ac Motor Control
• Manufacturer: STMicroelectronics

CLOCK CONTROL REGISTERS (Cont’d)
PLL CONFIGURATION REGISTER (PLLCONF)
R246 - Read/Write
Register Page: 55
Reset Value: xx00 x111
Bit 5:4 = MX[1:0]: PLL Multiplication Factor .
Refer to
multiplier settings.
Bit 2:0 = DX[2:0]: PLL output clock divider factor.
Refer to
settings.
Figure 31. RCCU General Timing
7
-
-
Table 16 Divider Configuration
Table 15 PLL Multiplication Factors
(*) WUIMU
(**) +/- 1 T
MX1 MX0
Multiplier
External
RESET
Internal
INTCLK
request
reset
STOP
clock
clock
Xtal
Xtal
(*)
-
DX2
20478xT
PLL turned on by user
ST92141 - RESET AND CLOCK CONTROL UNIT (RCCU)
DX1
for divider
Xtal
(**)
Exit from RESET
DX0
0
for
Xtal/2
Lock-in
Table 15. PLL Multiplication Factors
Table 16. Divider Configuration
time
PLL
DX2
0
0
0
0
1
1
1
1
MX1
Acknowledged
1
0
1
0
PLL
4 xT
PLL selected by user
STOP
sys
DX1
0
0
1
1
0
0
1
1
start-up
Quartz
MX0
10239*CLOCK2
0
0
1
1
DX0
0
1
0
1
0
1
0
1
Lock-in
(PLL OFF, Reset State)
Xtal/2
PLL
time
PLL CLOCK/1
PLL CLOCK/2
PLL CLOCK/3
PLL CLOCK/4
PLL CLOCK/5
PLL CLOCK/6
PLL CLOCK/7
CLOCK2 x
PLL clock
PLL
Switch to
CLOCK2
CK
14
10
8
6
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