參數(shù)資料
型號(hào)： M37224M3
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 8 Bits Microcomputer(8位單片機(jī))
中文描述： 單芯片8位單片機(jī)（8位單片機(jī)）
文件頁(yè)數(shù)： 52/83頁(yè)
文件大?。?/td> 901K
代理商： M37224M3
M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
52
X
IN
X
OUT
C
IN
M37224M3-XXXSP
C
OUT
20
19
CLOCK GENERATING CIRCUIT
The built-in clock generating circuit is shown in Figure 57. When the
STP instruction is executed, the internal clock
φ
stops at HIGH. At
the same time, timers 3 and 4 are connected by hardware and “FF
16
”
is set in timer 3 and “07
16
” is set in the timer 4. Select f(X
IN
)/16 as the
timer 3 count source (set bit 0 of the timer 34 mode register to “0”
before the execution of the STP instruction). Moreover, set the timer
3 and timer 4 interrupt enable bits to disabled (“0”) before execution
of the STP instruction). The oscillator restarts when external inter-
rupt is accepted. However, the internal clock
φ
keeps its HIGH until
timer 4 overflows, allowing time for oscillation stabilization when a
ceramic resonator or a quartz-crystal oscillator is used.
When the WIT instruction is executed, the internal clock
φ
stops in
the HIGH but the oscillator continues running. This wait state is re-
leased when an interrupt is accepted (Note). Since the oscillator does
not stop, the next instruction can be executed at once.
When returning from the stop or the wait state, to accept an interrupt,
set the corresponding interrupt enable bit to “1” before executing the
STP or the WIT instructions.
Note:
In the wait mode, the following interrupts are invalid.
(1) V
SYNC
interrupt
(2) CRT interrupt
(3) f(X
IN
)/4096 interrupt
(4) Timer 1 interrupt using f(X
IN
)/4096 as count source
(5) Timer 2 interrupt using P2
4
/TIM2 pin input as count source
(6) Timer 3 interrupt using P2
3
/TIM3 pin input as count source
(7) Timer 4 interrupt using f(X
IN
)/2 as count source
(8) Multi-master I
2
C-BUS interface interrupt
A circuit example using a ceramic resonator (or a quartz-crystal os-
cillator) is shown in Figure 55. Use the circuit constants in accor-
dance with the resonator manufacture’s recommended values. A cir-
cuit example with external clock input is shown in Figure 56. Input
the clock to the X
IN
pin, and open the X
OUT
pin.
Fig. 57. Clock Generating Circuit Block Diagram
Fig. 56. External Clock Input Circuit Example
Fig. 55. Ceramic Resonator Circuit Example
X
IN
19
M37224M3-XXXSP
Vcc
Vss
External oscillation circuit
Interrupt request
Interrupt disable
flag I
Reset
S
Q
R
STP instruction
S
Q
R
WIT
instruction
S
Q
R
STP
instruction
Reset
Internal clock
1/2
1/8
Timer 3
Timer 4
X
OUT
X
IN
T34M0
T34M2
Selection gate :
Connected to black
side at reset.
T34M : Timer 34 mode
register
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37224M3-050SP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37224M3-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37225ECSP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37225M6 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37225M8 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
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