TMP92CF30
2009-06-12
92CF30-29
3.4.2
SFR
7 6 5 4 3 2 1 0
bit Symbol
XTEN
USBCLK1
USBCLK0
WUEF PRCK
Read/write
R/W
R/W R/W
Reset State
1 0 0 0 0
Function
Low
-frequency
oscillator
circuit (fs)
0: Stop
1: Oscillation
Select the clock of
USB(f
USB
)
00:Disable
01: Reserved
10: X1USB
11: f
PLLUSB
Warm-up
Timer
0: Write
Don’t care
Note3
1: Write
start timer
0: Read
end
warm-up
1: Read
do not end
warm-up
Select
Prescaler
clock
0: f
SYS
/2
1: f
SYS
/8
SYSCR0
(10E0H)
7 6 5 4 3 2 1 0
bit Symbol
GEAR2
GEAR1
GEAR0
Read/write
R/W
Reset State
1
0
0
Function
Select gear value of high frequency
(fc)
000: fc
001: fc/2
010: fc/4
011: fc/8
100: fc/16
101: Reserved
110: Reserved
111: Reserved
SYSCR1
(10E1H)
7 6 5 4 3 2 1 0
bit Symbol
– CKOSEL
WUPTM1
WUPTM0
HALTM1
HALTM0
Read/write
R/W
Reset State
0 0 1 0 1 1
SYSCR2
(10E2H)
Function Always
write “0”
Select
CLKOUT
0: f
SYS
1: f
S
Warm-Up Timer
00: Reserved
01: 2
8
/inputted frequency
10:2
14
/inputted frequency
11:2
16
/inputted frequency
HALT mode
00: Reserved
01: STOP mode
10: IDLE1 mode
11: IDLE2 mode
Note1: The unassigned registers, SYSCR0<bit7><bit3><bit1>,SYSCR1<bit7:3> and SYSCR2<bit1:0> are read as
undefined value.
Note2: Low frequency oscillator circuit is enabled on reset.
Note3: Do not write SYSCR0 resiter during warming up. Because the warm-up end flag doesn’t become enable if
write “0” to SYSCR0<WUEF> bit during warming up.
(A read-modify–write operation cannot be performed for SYSCR0 register during warming up.)
Figure 3.4.3 SFR for system clock
Содержание TLCS-900/H1 Series
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