參數(shù)資料
型號(hào)： M30102M3T-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁數(shù)： 38/166頁
文件大?。?/td> 2060K
代理商： M30102M3T-XXXFP
Under
development
Tentative Specifications REV.E1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Usage precaution
129
Stop Mode
(1) After returning from stop mode, an unexpected operation may occur (for example, undefined instruction
interrupt, BRK instruction interrupt, etc.).
Execute a JMP.B instruction after an instruction to write data to the all clock stop control bit. A program
example is described as follows:
MOV.B:S
#21H, CM1 ; writing to the all clock stop control bit to “1”(stop mode)
JMP.B
L1
L1 :
NOP
Interrupts
(1) Reading Address 0 by Firmware
Please do not read address 0 by firmware. In the CPU's interrupt processing sequence, when a
maskable interrupt occurs, the interrupt information (interrupt no. and interrupt request level) are read
from address 0. This read in turn, clears the interrupt request bit to "0" even pending with higher request
level. Reading address 0 by firmware may cause interrupt cancellation or unexpected interrupts so
please do not read address 0 by firmware.
(2) Stack Pointer
Set the value of the stack pointer before accepting interrupts. Immediately after a reset, the value of the
stack pointer is 000016. Accepting an interrupt before setting a value of the stack pointer may produce
unpredictable results (runaway program, etc.) Make sure that you set the value of the stack pointer
before accepting interrupts.
(3) External interrupts
Clear the interrupt request bit to "0" when the INT0 - INT3 polarity is changed. The reason being is that
an interrupt request may be generated when the polarity is changed.
(4) Rewriting the Interrupt Control Register
When rewriting the Interrupt Control Register, do it at a point where it does not generate an interrupt
request for that register. If there is a possibility that an interrupt may occur, disable the interrupt before
rewriting. Examples are shown below.
Example 1:
INT_SWITCH1:
FCLR
I
; Disable interrupts.
AND.B
#00h, 0055h
; Clear T1IC int. priority level and int. request bit.
NOP
;
NOP
FSET
I
; Enable interrupts.
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