Oscillation Stabilization Wait Time Setting Register (Watr) - Fujitsu 8FX Hardware Manual

CHAPTER 3 CLOCK CONTROLLER
3.3 Registers
3.3.3 Oscillation Stabilization Wait Time Setting
Register (WATR)
The oscillation stabilization wait time setting register (WATR) sets oscillation
stabilization wait times.
■ Register Configuration
bit 7
Field SWT3
Attribute R/W
Initial value 1
■ Register Functions
[bit7:4] SWT[3:0]: Subclock oscillation stabilization wait time select bits
These bits select the subclock oscillation stabilization wait time.
bit7:4
Writing "1111"
Writing "1110"
Writing "1101"
Writing "1100"
Writing "1011"
Writing "1010"
Writing "1001"
Writing "1000"
Writing "0111"
Writing "0110"
Writing "0101"
Writing "0100"
Writing "0011"
Writing "0010"
Writing "0001"
Writing "0000"
The number of cycles in the above table is the minimum value. The maximum value is the number of cycles
in the above table plus 1/F
Note: Do not modify these bits during subclock oscillation stabilization wait time. Modify them when the
subclock oscillation stabilization bit in the system clock control register 2 (SYCC2:SRDY) has been
set to "1". These bits can be modified when the subclock is stopped with the subclock oscillation stop
bit in the system clock control register 2 (SYCC2:SOSCE) set to "0" in main clock mode, main CR
clock mode, main CR PLL clock mode, or sub-CR clock mode.
30
6 5
SWT2 SWT1
R/W R/W
1 1
No. of cycles
15
15
(2 -2)/F
2 - 2
14
14
(2 -2)/F
2 - 2
13
13
(2 -2)/F
2 - 2
12
12
(2 -2)/F
2 - 2
11
11
(2 -2)/F
2 - 2
10
10
(2 -2)/F
2 - 2
9
9
(2 -2)/F
2 - 2
8
8
(2 -2)/F
2 - 2
7
7
(2 -2)/F
2 - 2
6
6
(2 -2)/F
2 - 2
5
5
(2 -2)/F
2 - 2
4
4
(2 -2)/F
2 - 2
3
3
(2 -2)/F
2 - 2
2
2
(2 -2)/F
2 - 2
1
1
(2 -2)/F
2 - 2
1
1
(2 -2)/F
2 - 2
.
CL
FUJITSU SEMICONDUCTOR LIMITED
4 3
SWT0 MWT3
R/W R/W
1 1
Details
Subclock (F
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
CL
MB95630H Series
2 1
MWT2 MWT1
R/W R/W
1 1
) = 32.768 kHz
CL
About 1.0 s
About 0.5 s
About 0.25 s
About 0.125 s
About 62.44 ms
About 31.19 ms
About 15.56 ms
About 7.75 ms
About 3.85 ms
About 1.89 ms
About 915.5 µs
About 427.2 µs
About 183.1 µs
About 61.0 µs
0.0 µs
0.0 µs
MN702-00009-2v0-E
0
MWT0
R/W
1