Section 17
Clock Pulse Generator
Rev.2.00 Jun. 28, 2007 Page 555 of 666
REJ09B0311-0200
Bit Bit
Name
Initial
Value R/W Description
10
9
8
ICK2
ICK1
ICK0
0
1
0
R/W
R/W
R/W
System Clock (I
φ
) Select
These bits select the frequency of the system clock
provided to the CPU and DTC. The ratio to the input clock
is as follows:
000:
×
4
001:
×
2
010:
×
1
011:
×
1/2
1XX: Setting prohibited
The frequencies of the peripheral module clock and
external bus clock change to the same frequency as the
system clock if the frequency of the system clock is lower
than that of the two clocks.
7
0 R/W
Reserved
This bit is always read as 0. The write value should
always be 0.
6
5
4
PCK2
PCK1
PCK0
0
1
0
R/W
R/W
R/W
Peripheral Module Clock (P
φ
) Select
These bits select the frequency of the peripheral module
clock. The ratio to the input clock is as follows:
000:
×
4
001:
×
2
010:
×
1
011:
×
1/2
1XX: Setting prohibited
The frequency of the peripheral module clock should be
lower than that of the system clock. Though these bits
can be set so as to make the frequency of the peripheral
module clock higher than that of the system clock, the
clocks will have the same frequency in reality.
3
0 R/W
Reserved
This bit is always read as 0. The write value should
always be 0.
Содержание H8SX/1650
Страница 2: ...Rev 2 00 Jun 28 2007 Page ii of xxii...
Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
Страница 676: ...Appendix Rev 2 00 Jun 28 2007 Page 654 of 666 REJ09B0311 0200...
Страница 688: ...Rev 2 00 Jun 28 2007 Page 666 of 666 REJ09B0311 0200...
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Страница 692: ...H8SX 1650 Group Hardware Manual...