參數(shù)資料
型號(hào): UPD70741GC-25-8EU
廠商: NEC Corp.
元件分類(lèi): 16位微控制器
英文描述: V821TM 32-/16-BIT MICROPROCESSOR
中文描述: V821TM 32-/16-BIT微處理器
文件頁(yè)數(shù): 46/112頁(yè)
文件大小: 605K
代理商: UPD70741GC-25-8EU
μ
PD70741
46
12. CLOCK GENERATION FUNCTIONS
The clock generator generates and controls the internal clock pulse (
φ
) for the CPU and other built-in hardware
units.
12.1 Features
Frequency multiplication (5 times) using a PLL (phase locked loop) synthesizer
Clock sources
Resonator-based oscillation: f
XX
=
φ
/5
External clock
: f
XX
=
φ
/5
External clock
: f
XX
= 2
×
φ
(direct mode)
Clock output control
(PLL mode)
(PLL mode)
Figure 12-1. Configuration
: Internal clock frequency ( = 1/210f
XX
: PLL mode)
Internal clock frequency ( = 1/2f
XX
: Direct mode)
: Oscillator (only for the PLL mode)
OSC
φ
RESET
TCLR
X1
(f
XX
)
X2
OSC
1
2
Latch
PLL synthesizer
1
2
φ
CLKOUT
(10 f
XX
)
PLL mode
Direct mode
(f
XX
)
STOP mode
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