參數(shù)資料
型號: M38004M6-XXXFP
廠商: Mitsubishi Electric Corporation
英文描述: Replaced by TLK3114SC :
中文描述: 8位單片機
文件頁數(shù): 42/173頁
文件大?。?/td> 4203K
代理商: M38004M6-XXXFP
1-28
HARDWARE
3800 GROUP USER’S MANUAL
Clock Generating Circuit
An oscillation circuit can be formed by connecting a resonator be-
tween X
IN
and X
OUT
. To supply a clock signal externally, input it to
the X
IN
pin and make the X
OUT
pin open.
Oscillation control
Stop Mode
If the STP instruction is executed, the internal clock
φ
stops at “H”.
Timer 1 is set to “01
16
” and prescaler 12 is set to “FF
16
”.
Oscillator restarts when an external interrupt is received, but the
internal clock
φ
remains at “H” until timer 1 underflows.
This allows time for the clock circuit oscillation to stabilize.
If oscillator is restarted by a reset, no wait time is generated, so
keep the RESET pin at “L” level until oscillation has stabilized.
Wait Mode
If the WIT instruction is executed, the internal clock
φ
stops at an
“H” level, but the oscillator itself does not stop. The internal clock
restarts if a reset occurs or when an interrupt is received.
Since the oscillator does not stop, normal operation can be started
immediately after the clock is restarted.
To ensure that interrupts will be received to release the STP or
WIT state, interrupt enable bits must be set to “1” before the STP
or WIT instruction is executed.
When the STP status is released, prescaler 12 and timer 1 will
start counting and reset will not be released until timer 1
underflows, so set the timer 1 interrupt enable bit to “0” before the
STP instruction is executed.
Fig. 27 Block diagram of clock generating circuit
Fig. 26 External clock input circuit
Fig. 25 Ceramic resonator circuit
FUNCTIONAL DESCRIPTION
C
OUT
X
IN
X
OUT
C
IN
X
IN
X
OUT
Open
External oscillation
circuit
Vss
Vcc
1/8
X
OUT
X
IN
R
S
Q
STP instruction
WIT
instruction
R
S
Q
R
S
Q
Reset
STP instruction
Timer 1
ONW
control
Prescaler 12
1/2
φ
output
Internal clock
φ
Rd
Rf
ONW pin
Single-chip mode
Reset
Interrupt request
Interrupt disable
flag (I)
FF
16
01
16
Reset or STP instruction
相關PDF資料
PDF描述
M38004M6-XXXFS 1 watt dc-dc converters
M38004M6-XXXHP 1 watt dc-dc converters
M38004M6-XXXSP 1 watt dc-dc converters
M38004M6-XXXSS 4-Ch 600 Mbps to 3.75 Gbps Multi-Rate Transceiver 289-BGA -40 to 85
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相關代理商/技術參數(shù)
參數(shù)描述
M38004M6-XXXFS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38004M6-XXXHP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38004M6-XXXSP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38004M6-XXXSS 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
M38004M7-DXXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES