Section 25 Clock Pulse Generator
Rev. 1.00 Apr. 28, 2008 Page 833 of 994
REJ09B0452-0100
Section 25 Clock Pulse Generator
This LSI incorporates a clock pulse generator which generates the system clock (
φ
), internal clock,
bus master clock, and subclock (
φ
SUB). The clock pulse generator consists of an oscillator, duty
correction circuit, system clock select circuit, subclock input circuit, and subclock waveform
forming circuit. Figure 25.1 shows a block diagram of the clock pulse generator.
EXTAL
XTAL
EXCL
(ExEXCL)
WDT_1
count clock,
CIR
sampling clock
φ
φ
SUB
Subclock
input circuit
Subclock
waveform
forming circuit
Oscillator
System clock
to
φ
pin
Internal clock
to on-chip
peripheral modules
System
clock
select
circuit
Bus master
clock to CPU
φ
Duty
correction
circuit
Figure 25.1 Block Diagram of Clock Pulse Generator
The subclock input is controlled by software according to the EXCLE bit and the EXCLS bit in
the port control register (PTCNT0) settings in the low power control register (LPWRCR). For
details on LPWRCR, see section 26.1.2, Low-Power Control Register (LPWRCR). For details on
PTCNT0, see section 7.3.1, Port Control Register 0 (PTCNT0).
Содержание H8S/2100 Series
Страница 2: ...Rev 1 00 Apr 28 2008 Page ii of xxvi...
Страница 54: ...Section 1 Overview Rev 1 00 Apr 28 2008 Page 28 of 994 REJ09B0452 0100...
Страница 92: ...Section 2 CPU Rev 1 00 Apr 28 2008 Page 66 of 994 REJ09B0452 0100...
Страница 158: ...Section 5 Interrupt Controller Rev 1 00 Apr 28 2008 Page 132 of 994 REJ09B0452 0100...
Страница 244: ...Section 8 8 Bit PWM Timer PWMU Rev 1 00 Apr 28 2008 Page 218 of 994 REJ09B0452 0100...
Страница 330: ...Section 10 16 Bit Timer Pulse Unit TPU Rev 1 00 Apr 28 2008 Page 304 of 994 REJ09B0452 0100...
Страница 354: ...Section 11 16 Bit Cycle Measurement Timer TCM Rev 1 00 Apr 28 2008 Page 328 of 994 REJ09B0452 0100...
Страница 380: ...Section 12 16 Bit Duty Period Measurement Timer TDP Rev 1 00 Apr 28 2008 Page 354 of 994 REJ09B0452 0100...
Страница 416: ...Section 13 8 Bit Timer TMR Rev 1 00 Apr 28 2008 Page 390 of 994 REJ09B0452 0100...
Страница 494: ...Section 15 Serial Communication Interface SCI Rev 1 00 Apr 28 2008 Page 468 of 994 REJ09B0452 0100...
Страница 612: ...Section 18 I 2 C Bus Interface IIC Rev 1 00 Apr 28 2008 Page 586 of 994 REJ09B0452 0100...
Страница 706: ...Section 20 LPC Interface LPC Rev 1 00 Apr 28 2008 Page 680 of 994 REJ09B0452 0100...
Страница 752: ...Section 21 FSI Interface Rev 1 00 Apr 28 2008 Page 726 of 994 REJ09B0452 0100...
Страница 774: ...Section 23 RAM Rev 1 00 Apr 28 2008 Page 748 of 994 REJ09B0452 0100...
Страница 1008: ...Section 28 Electrical Characteristics Rev 1 00 Apr 28 2008 Page 982 of 994 REJ09B0452 0100...
Страница 1020: ...Rev 1 00 Apr 28 2008 Page 994 of 994 REJ09B0452 0100...
Страница 1023: ......
Страница 1024: ...H8S 2117R Group Hardware Manual...