參數(shù)資料
型號: UPD750108
廠商: NEC Corp.
英文描述: 4 BIT SINGLE-CHIP MICROCONTROLLER
中文描述: 4位單片機
文件頁數(shù): 23/80頁
文件大小: 525K
代理商: UPD750108
23
μ
PD750104, 750106, 750108, 750104(A), 750106(A), 750108(A)
6.3 Control Functions of Subsystem Clock Oscillator
The subsystem clock oscillator of the
μ
PD750108 has two control functions to decrease the supply current.
The function to select with the software whether to use the built-in feedback resistor
Note
The function to suppress the supply current by reducing the drive current of the built-in inverter when the supply
voltage is high (V
DD
2.7 V)
Note
When the subsystem clock is not used, set SOS.0 to 1 (not to use the built-in feedback resistor), connect
XT1 to V
SS
or V
DD
, and open XT2. This makes it possible to reduce the supply current required by the
subsystem clock oscillator.
Each function can be used by switching bits 0 and 1 in the sub-oscillator control register (SOS). (See
Figure 6-
2.
)
Figure 6-2. Subsystem Clock Oscillator
SOS.0
SOS.1
XT1
XT2
Inverter
Feedback resistor
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