參數(shù)資料
型號(hào): M38512M4
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁數(shù): 38/61頁
文件大小: 904K
代理商: M38512M4
38
3851 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 47 System clock generating circuit block diagram (Single-chip mode)
MISRG
(MISRG : address 0038
16
)
Oscillation stabilizing time set after STP
instruction released bit
0: Automatically set “01
16
” to Timer 1,
“FF
16
” to Prescaler 12
1: Automatically set nothing
Reserved bit “0”
Do not write “1“.
Not used (return “0” when read)
b7
b0
Fig. 46 Structure of MISRG
WIT instruction
STP instruction
Timing
φ
(internal clock)
S
R
Q
STP instruction
S
R
Q
Main clock stop bit
S
R
Q
1/2
1/4
X
IN
X
OUT
X
COUT
X
CIN
Interrupt request
Reset
Interrupt disable flag l
1/2
Port X
C
switch bit
“1”
“0”
Low-speed mode
High-speed or
middle-speed
mode
Middle-speed mode
High-speed or
low-speed mode
Main clock division ratio
selection bits
(Note)
Note:
Any one of high-speed, middle-speed or low-speed mode is selected by bits 7 and 6 of the CPU mode register.
When low-speed mode is selected, set port Xc switch bit (b1) to “1”.
Main clock division ratio
selection bits
(Note)
FF
16
01
16
Prescaler 12
Timer 1
Reset or
STP instruction
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