參數資料
型號: UPD178076
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數: 35/72頁
文件大?。?/td> 366K
代理商: UPD178076
35
μ
PD178076, 178078, 178096, 178098
Data Sheet U12885EJ3V0DS00
3.8 PLL Frequency Synthesizer
Figure 3-15. Block Diagram of PLL Frequency Synthesizer
Internal bus
Internal bus
PLL mode
Select register
(PLLMD)
VCOH
DMD
DMD
PLL
data transfer
register (PLLNS)
PLL
NS0
PLL
MD0
PLL
MD1
VCOL
PLL
RF2
PLL
RF1
PLL
RF0
PLL
UL0
PLL reference
mode register
(PLLRF)
PLL unlock
F/F Judge register
(PLLUL)
PLL
RF3
2
Input select
block
Programmable
divider
Phase
comparator
( - DET)
Unlock
F/F
Reference
frequency
generator
6.3 MHz
or
4.5 MHz
Note 2
4
Charge pump
EO1
EO0
VCOH
VCOL
Note 1
Note 1
Mixer
Voltage control
generator
Lowpass filter
2
f
N
f
r
PLL data register
(PLLRL, PLLRH, PLLR0)
Notes 1.
These are external circuits.
2.
When the IEBus controller of the
μ
PD178096 and 178098 is used, the 4.5-MHz crystal resonator
cannot be used. Use the 6.3-MHz crystal resonator.
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