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105
CHAPTER 5 CLOCKS
Figure 5.5-1 shows the status change caused by machine clock switching.
Figure 5.5-1 Status Change Diagram for Machine Clock Selection
Main
MCS = 1
MCM = 1
SCS = 1
SCM = 1
CS1, CS0 = xx
B
CS2=x
PLL1 --> Main
MCS = 1
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 00
B
CS2=0
PLL1: Multiplied
MCS = 0
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 00
B
CS2=0
PLL2: Multiplied
MCS = 0
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 01
B
CS2=0
PLL3: Multiplied
MCS = 0
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 10
B
CS2=0
PLL4: Multiplied
MCS = 0
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 11
B
CS2=0
PLL2 --> Main
MCS = 1
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 01
B
CS2=0
PLL3 --> Main
MCS = 1
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 10
B
CS2=0
PLL4 --> Main
MCS = 1
MCM = 0
SCS = 1
SCM= 1
CS1, CS0 = 11
B
CS2=0
PLL1 --> Sub
MCS = 1
MCM = 0
SCS = 0
SCM = 1
CS1, CS = 00
B
CS2=0
PLL2 --> Sub
MCS = 1
MCM = 0
SCS = 0
SCM = 1
CS1, CS0 = 01
B
CS2=0
PLL3 --> Sub
MCS = 1
MCM = 0
SCS = 0
SCM = 1
CS1, CS0 =10
B
CS2=0
PLL4 --> Sub
MCS = 1
MCM = 0
SCS = 0
SCM = 1
CS1, CS0 = 11
B
CS2=0
(10)
Main --> Sub
MCS = 1
MCM = 1
SCS = 0
SCM = 1
CS1, CS0 = xx
B
CS2=x
Sub --> Main
MCS = 1
MCM = 1
SCS = 1
SCM = 0
CS1, CS0 = xx
B
CS2=x
Sub
MCS = X
MCM = 1
SCS = 0
SCM = 0
CS1, CS0 = xx
B
CS2=x
Main --> PLLx
MCS = 0
MCM = 1
SCS = 1
SCM = 1
CS1, CS0 = xx
B
CS2=x
(21)
(21)
(21)
(21)
(21)
(11)
(10)
(1)
(12)
(13)
(8)
(2)
(3)
(4)
(6)
(5)
PLL6: Multiplied
MCS = 0
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 10
B
CS2=1
PLL6 --> Main
MCS = 1
MCM = 0
SCS = 1
SCM = 1
CS1, CS0 = 10
B
CS2=1
PLL6 --> Sub
MCS = 1
MCM = 0
SCS = 0
SCM = 1
CS1, CS0 =10
B
CS2=1
(8)
(9)
(10)
(8)
(9)
(10)
(8)
(9)
(10)
(8)
(9)
(10)
(8)
(9)
(10)
(12)
(14)
(15)
(16)
(17)
(18)
Sub --> PLL
MCS = 0
MCM = 1
SCS = 1
SCM = 0
CS1, CS0 = xx
B
CS2=0
(11)
(20)