參數(shù)資料
型號(hào)： M37905M6C-XXXSP
廠商： Mitsubishi Electric Corporation
英文描述： DIO, BAT54C, DUAL SHOTTKEY, COMMON CATHODE, SOT23
中文描述： 16位CMOS微機(jī)
文件頁(yè)數(shù)： 80/102頁(yè)
文件大小： 881K
代理商： M37905M6C-XXXSP
80
M37905M4C-XXXFP, M37905M4C-XXXSP
M37905M6C-XXXFP, M37905M6C-XXXSP
M37905M8C-XXXFP, M37905M8C-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
16-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
OSCILLATION CIRCUIT
An oscillation circuit locates between pins X
IN
and X
OUT
, and Figure
90 shows a circuit example with an external ceramic resonator or
quartz crystal oscillator. The constants such as capacitance etc. de-
pend on a resonator/oscillator. Therefore, for these constants, adopt
the resonator/oscillator manufacturer’s recommended values.
Figure 91 shows a circuit example with an external clock source.
When an external clock is input, be sure to leave pin X
OUT
open.
Also, in this case, when the external clock input select bit (bit 1 of the
particular function select register 0; See Figure 95.) is set to “1”, the
oscillation circuit stops it’s operation and resumes the current dissi-
pation. Moreover, this bit has another function, which selects the re-
turn condition from the stop mode. For details, refer to the section on
the standby function.
On the other hand, the PLL (Phase Locked Loop) frequency multi-
plier (hereafter, referred to as PLL circuit.) is included, also. This PLL
circuit uses a clock input from pin X
IN
and generates a multiplicated
clock. When using the PLL circuit, be sure to connect pin V
CONT
with
an external filter circuit. (See Figure 92.) When not using the PLL cir-
cuit, be sure to leave pin V
CONT
open.
When not using the PLL circuit, be sure to clear the PLL circuit op-
eration enable bit (bit 1 of the clock control register 0; See Figure
94.), so that the PLL circuit will stop its operation.
Fig. 90 Circuit example with external ceramic resonator or quartz-crystal oscillator
Fig. 91 Circuit example with external clock source
Fig. 92 Circuit example of connection with pin V
CONT
when PLL cir-
cuit used
X
IN
R
f
X
OUT
R
d
C
IN
C
OUT
M37905
M37905
X
IN
X
OUT
Left open.
External clock source
Vcc
Vss
M37905
V
CONT
1 k
0.1
μ
F
220 pF
Note:
Make the wiring length as short as possible,
and shield it with the GND line which
surrounds this circuit. Also, for the clock
supply to pin X
IN
, see Figures 90 and 91.
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