參數(shù)資料
型號: M37517F8HP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48
封裝: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁數(shù): 49/98頁
文件大?。?/td> 886K
代理商: M37517F8HP
Rev.1.01
Aug 02, 2004
page 53 of 96
7517 Group
Fig. 60 System clock generating circuit block diagram (Single-chip mode)
WIT instruction
STP instruction
S
R
Q
S
R
QS
R
Q
XCOUT
XCIN
Interrupt request
Reset
Interrupt disable flag l
1/2
1/4
1/2
Port XC switch bit
“1”
“0”
XIN
XOUT
High-speed or
middle-speed
mode
Main clock division ratio
selection bit (Note 1)
Note: Any one of high-speed mode, middle-speed mode 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 (b4) to “1”.
Timing
φ
(Internal clock)
Main clock stop bit
High-speed or
low-speed mode
Main clock division ratio
selection bits (Note 1)
Prescaler 12
Timer 1
Middle-speed mode
Low-speed mode
High-speed on-chip oscillation stop bit
XIN switching inhibit bit
Port XC switch bit
Clock source
switch bit
Data bus
32kHZ RC oscillation enable bit
1/2
High-speed on-chip
oscillation circuit
XIN-XOUT oscillation
High-speed
on-chip
oscillation
32kHZ RC oscillation enable bit
32 kHZ oscillation control
registers 0, 1
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