參數(shù)資料
型號: uPD750066CU
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 4位單晶片微控制器
文件頁數(shù): 25/82頁
文件大?。?/td> 460K
代理商: UPD750066CU
25
μ
PD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)
Data Sheet U10165EJ2V0DS00
6.3 Subsystem Clock Oscillator Control Function
The subsystem clock oscillator of the
μ
PD750068 has the following two control functions to decrease the supply
current.
Selects by software whether an internal feedback resistor is to be used or not
Note
.
Reduces current consumption by decreasing the drive current of the on-chip 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 (so as not to use the internal feedback resistor)
by software, connect XT1 to V
SS
, and open XT2. This makes it possible to reduce the current
consumption in the subsystem clock oscillator.
The above functions can be used by switching the bits 0 and 1 of the sub-oscillator control register (SOS). (Refer
to Figure 6-2.)
Figure 6-2. Subsystem Clock Oscillator
Feedback resistor
SOS.0
SOS.1
XT1
XT2
Inverter
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