Section 15 Clock Pulse Generator (CPG)
Rev.1.00 Dec. 13, 2005 Page 619 of 1286
REJ09B0158-0100
15.4.1 Frequency
Control Register (FRQCR)
FRQCR is a 32-bit readable/writable register that selects the frequency division ratio of the
SuperHyway clock (SHck), the peripheral clock (Pck), the DDR clock (DDRck) and the bus clock
(Bck). Refer to the clock operating mode table about the frequency multiplication ratio. FRQCR
can only be accessed in longwords. FRQCR is initialized by a power-on reset via the
PRESET
pin
and WDT over-flow.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
30
0
0
0
0
0
0
1
0
0
0
CFC[3:0]
*
BFC[3:0]
*
IFC0
*
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
BIt:
Initial value:
R/W:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
1
0
0
1
1
0
0
0
P1FC[3:0]
*
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
BIt:
Note: The initial values of these fields after power-on reset depend on the mode pins setting (see table 15.2).
Initial value:
R/W:
Bit Bit
Name
Initial
Value R/W
Description
31 to 28
0001
R
Reserved
These bits are always read as 0001. The write value
should always be 0001.
27 to 25
000
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Writing to other than 000, the operation of this LSI is
not guaranteed.
24 IFC0
*
Undefined
R/W
23
22
21
20
CFC3
*
CFC2
*
CFC1
*
CFC0
*
0
Undefined
Undefined
0
R/W
CPU Clock (Ick) and SuperHyway Clock (SHck)
Frequency Division Ratio Setting
00010:
×
12 (Ick),
×
6 (SHck) Clock operating mode 0, 1,
2 or 3 (after power-on reset)
00100:
×
12 (Ick),
×
4 (SHck) Clock operating mode 12
(after power-on reset)
10000:
×
6 (Ick),
×
6 (SHck) Register setting
(register setting after initialized)
Other than above: Setting prohibited
The initial value of this field after power-on reset
depends on the mode pins setting (see table 15.2).
Содержание SH7780 Series
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Страница 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Страница 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Страница 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Страница 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Страница 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Страница 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Страница 1004: ...Section 24 Multimedia Card Interface MMCIF Rev 1 00 Dec 13 2005 Page 954 of 1286 REJ09B0158 0100 ...
Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Страница 1070: ...Section 26 Serial Sound Interface SSI Module Rev 1 00 Dec 13 2005 Page 1020 of 1286 REJ09B0158 0100 ...
Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
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Страница 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
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