參數(shù)資料
型號： M38067M8DXXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP80
封裝： 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù)： 24/60頁
文件大?。?/td> 712K
代理商： M38067M8DXXXFP
27
MITSUBISHI MICROCOMPUTERS
3806 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Reset Circuit
______
To reset the microcomputer, the RESET pin should be held at an
______
“L” level for 2
s or more. Then the RESET pin is returned to an
“H” level (Note 1), reset is released. Internal operation does not
begin until after 8 to 13 XIN clock cycles are completed. After the
reset is completed, the program starts from the address contained
in address FFFD16 (high-order byte) and address FFFC16 (low-or-
der byte).
Make sure that the reset input voltage is less than 0.8 V for VCC of
4.0 V (Note 2).
Note 1. The power source voltage should be between the follow-
ing voltage.
Between 3.0 V and 5.5 V for standard version
Between 4.0 V and 5.5 V for extended operating tem-
perature version
Between 2.7 V and 5.5 V for high-speed version
Note 2. Reset input voltage is less than the following voltage.
0.6 V for VCC = 3.0 V
0.8 V for VCC = 4.0 V
0.54 V for VCC = 2.7 V
Fig. 23 Internal status of microcomputer after reset
Fig. 22 Example of reset circuit
4.0V
0.8V
0V
VCC
RESET
Power source
voltage
Reset input
voltage
VSS
M51953AL
4
5
1
3
0.1
F
3806 group
Note. ! : Undefined
V : The initial values of CM1 are determined by the level at the
CNVSS pin.
The contents of all other registers and RAM are undefined
after a reset, so they must be initialized by software.
Register contents
(000116)
Timer 2
Port P0 direction register
Port P1 direction register
Port P2 direction register
Port P3 direction register
Port P4 direction register
Port P5 direction register
Port P6 direction register
Port P7 direction register
Port P8 direction register
Timer XY mode register
Serial I/O1 status register
Serial I/O1 control register
UART control register
Serial I/O2 control register
Timer 1
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(32)
(000316)
(000516)
(000716)
(000916)
(000B16)
(000D16)
(000F16)
(001116)
(001916)
(001A16)
(001B16)
(001D16)
(002016)
(002116)
(002216)
(002316)
(002416)
(002516)
(002616)
(002716)
(003416)
(003616)
(003716)
(003A16)
(003B16)
(003C16)
(003D16)
(003E16)
Address
Prescaler 12
Prescaler X
Timer X
Prescaler Y
Timer Y
AD/DA control register
D-A1 conversion register
D-A2 conversion register
Interrupt edge selection register
CPU mode register
Interrupt request register 1
Interrupt request register 2
Interrupt control register 1
Interrupt control register 2
Processor status register
Program counter
0016
00 0 0 0 0
0
V
0016
00 0 0 1 0
0
FF16
0016
FF16
0116
FF16
0016
11 1 0 0 0
0
10 0 0 0 0
0
0016
Contents of address FFFC16
!! !! ! 1
!
(PS)
(PCH)
(PCL)
Contents of address FFFD16
0016
(003F16)
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