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TMP93CS32F 데이터시트(PDF) 15 Page - Toshiba Semiconductor

부품명 TMP93CS32F
상세설명  CMOS 16-Bit Microcontroller
PDF  180 Pages
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제조업체  TOSHIBA [Toshiba Semiconductor]
홈페이지  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP93CS32F 데이터시트(HTML) 15 Page - Toshiba Semiconductor

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TMP93CS32
2004-02-10
93CS32-13
3.3.1
System Clock Controller
The system clock controller generates system clock (fSYS) for CPU core and internal I/O.
It contains a oscillation circuit and clock gear circuit. The register SYSCR1<GEAR2:0>
changes clock gear to either 1, 2, 4, 8, or 16 (fc, fc/2, fc/4, fc/8, or fc/16), and these functions
can reduce the power consumption of the equipment in which the device is installed.
The system clock (fSYS) is set to fc/32 (fc/16 × 1/2) because of <GEAR2:0> = “100” by
resetting. For example, fSYS is set to 0.625 MHz by resetting the case of 20 MHz oscillator
is connected to X1, X2 pins.
The fc clock can be easily obtained by connecting a resonator to the X1/X2 pins
respectively. Clock input from an external oscillator is also possible.
Figure 3.3.4 Examples of Resonator Connection
*
Accurate adjustment of the oscillation frequency
The CLK pin outputs at 1/2 the system clock frequency (fSYS/2) is used to monitor the
oscillation clock.
With a system requiring adjustment of the oscillation frequency, an adjusting program must
be written.
X1
X2
X1
X2
74HCU04
(a) Crystal/Ceramic resonator
(b) External oscillator



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