參數(shù)資料
型號(hào): M34571G4
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機(jī)的CMOS
文件頁數(shù): 49/126頁
文件大?。?/td> 1627K
代理商: M34571G4
Rev.1.02
REJ03B0179-0102
May 25, 2007
Page 49 of 124
4571 Group
CLOCK CONTROL
The clock control circuit consists of the following circuits.
Ceramic oscillation circuit
Frequency divider
Internal clock generating circuit
The system clock and the instruction clock are generated as the
source clock for operation by these circuits.
Figure 50 shows the structure of the clock control circuit.
Fig 50. Clock control circuit structure
X
IN
00
01
10
11
MR
3
, MR
2
Division circuit
divided by 8
divided by 4
divided by 2
Internal clock
generation circuit
(divided by 3)
System clock
(STCK)
Instruction clock
(INSTCK)
Ceramic
oscillation circuit
Voltage drop detection circuit
(reset occurs)
S
R
Q
EPOF instruction + POF instruction
Key-on wakeup signal
RESET
Oscillation
stop signal
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