參數(shù)資料
型號(hào)： M38207M8-XXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80
封裝： 0.80 MM PITCH, PLASTIC, QFP-80
文件頁(yè)數(shù)： 5/69頁(yè)
文件大?。?/td> 944K
代理商： M38207M8-XXXFP
10
MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
The 3820 group uses the standard 740 family instruction set. Re-
fer to the table of 740 family addressing modes and machine in-
structions or the SERIES 740 <Software> User’s Manual for de-
tails on the instruction set.
Machine-resident 740 family instructions are as follows:
The FST and SLW instruction cannot be used.
The STP, WIT, MUL, and DIV instruction can be used.
CPU Mode Register
The CPU mode register is allocated at address 003B16.
The CPU mode register contains the stack page selection bit and
the internal system clock selection bit.
Fig. 1 Structure of CPU mode register
CPU mode register
(CPUM (CM) : address 003B16)
7
0
Not available
Processor mode bits
b1 b0
0
0 : Single-chip mode
0
1 :
1
0 :
1
1 :
Stack page selection bit
0 : 0 RAM in the zero page is used as stack area
1 : 1 RAM in page 1 is used as stack area
Not used (returns “1” when read)
(Do not write “0” to this bit)
Port XC switch bit
0 : I/O port
1 : XCIN, XCOUT
Main clock ( X IN–XOUT) stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bit
0 : f(XIN)/2 (high-speed mode)
1 : f(XIN)/8 (middle-speed mode)
Internal system clock selection bit
0 : XIN-XOUT selected (middle-/high-speed mode)
1 : XCIN-XCOUT selected (low-speed mode)
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