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參數(shù)資料
| 型號： | 7513 |
| 英文描述： | 7513 Group Datasheet Datasheet 1067K/FEB.06.01 |
| 中文描述： | 7513組數(shù)據(jù)表數(shù)據(jù)表1067K/FEB.06.01 |
| 文件頁數(shù)： | 49/66頁 |
| 文件大?。?/td> | 1067K |
| 代理商： | 7513 |
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48
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7513 Group
CLOCK GENERATING CIRCUIT
The 7513 group has two built-in oscillation circuits. An oscillation
circuit can be formed by connecting a resonator between X
IN
and
X
OUT
(X
CIN
and X
COUT
). Use the circuit constants in accordance
with the resonator manufacturer
’
s recommended values. No exter-
nal resistor is needed between X
IN
and X
OUT
since a feed-back
resistor exists on-chip. However, an external feed-back resistor is
needed between X
CIN
and X
COUT
.
To supply a clock signal externally, input it to the X
IN
pin and make
the X
OUT
pin open. The sub-clock X
CIN
-X
COUT
oscillation circuit
cannot directly input clocks that are externally generated. Accord-
ingly, be sure to cause an external resonator to oscillate.
Immediately after poweron, only the X
IN
oscillation circuit starts
oscillating, and X
CIN
and X
COUT
pins go to high impedance state.
Frequency Control
(1) Middle-speed Mode
The internal clock
φ
is the frequency of X
IN
divided by 8.
After reset, this mode is selected.
(2) High-speed Mode
The internal clock
φ
is half the frequency of X
IN
.
(3) Low-speed Mode
G
The internal clock
φ
is half the frequency of X
CIN
.
G
A low-power consumption operation can be realized by stopping
the main clock X
IN
in this mode. To stop the main clock, set bit 5
of the CPU mode register to
“
1
”
.
When the main clock X
IN
is restarted, set enough time for oscil-
lation to stabilize by programming.
Note:
If you switch the mode between middle/high-speed and low-
speed, stabilize both X
IN
and X
CIN
oscillations. The
sufficient time is required for the sub-clock to stabilize, es-
pecially immediately after poweron and at returning from
stop mode. When switching the mode between middle/high-
speed and low-speed, set the frequency on condition that
f(X
IN
)>3f(X
CIN
).
Fig. 53 Ceramic resonator circuit
Fig. 54 External clock input circuit
Oscillation Control
(1) Stop Mode
If the STP instruction is executed, the internal clock
φ
stops at an
“
H
”
level, and X
IN
and X
CIN
oscillators stop. The value set to the
timer latch 1 and the timer latch 2 is loaded automatically to the
timer 1 and the timer 2. Thus, a value generated time for stabiliz-
ing oscillation should be set to the timer 1 latch and the timer 2
latch (low-order 8 bits for the timer 1, high-order 8 bits for the timer
2) before executing the STP instruction.
Either X
IN
or X
CIN
divided by 16 is input to timer 1 as count
source, and the output of timer 1 is connected to timer 2. The bits
of the timer 123 mode register except bit 4 are cleared to
“
0,
”
Set
the timer 1 and timer 2 interrupt enable bits to disabled (
“
0
”
) be-
fore executing the STP instruction. Oscillator restarts at reset or
when an external interrupt is received, but the internal clock
φ
is
not supplied to the CPU until timer 2 underflows. This allows timer
for the clock circuit oscillation to stabilize.
(2) Wait Mode
If the WIT instruction is executed, the internal clock
φ
stops at an
“
H
”
level. The states of X
IN
and X
CIN
are the same as the state be-
fore the executing the WIT instruction. The internal clock restarts
at reset or when an interrupt is received. Since the oscillator does
not stop, normal operation can be started immediately after the
clock is restarted.
X
IN
X
OUT
External oscillation
circuit
Open
V
CC
V
SS
C
CIN
C
COUT
Rf
Rd
X
CIN
X
COUT
C
IN
C
OUT
C
CIN
C
COUT
Rf
Rd
X
CIN
X
COUT
X
IN
X
OUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 75-130 | 制造商:Zierick Manufacturing Corporation 功能描述: |
| 75130-1213 | 制造商:MOLEX 功能描述: |
| 75-130477-52S | 功能描述:Circular Connector 制造商:amphenol industrial operations 系列:- 包裝:- 零件狀態(tài):有效 連接器類型:- 針腳數(shù):- 外殼尺寸 - 插件:- 外殼尺寸，MIL:- 安裝類型:- 端接:- 緊固類型:- 朝向:- 侵入防護:- 外殼材料，鍍層:- 觸頭鍍層:- 特性:- 觸頭鍍層厚度:- 額定電流:- 電壓 - 額定:- 工作溫度:- 標準包裝:1 |
| 75-131018-1G | 制造商:Amphenol Corporation 功能描述:75-131018-01G - Bulk |
| 75-131018-1I | 制造商:Amphenol Corporation 功能描述:75-131018-01I - Bulk |
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