參數(shù)資料
型號: M38869MFAHP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP80
封裝: 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件頁數(shù): 41/111頁
文件大?。?/td> 1644K
代理商: M38869MFAHP
35
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
for flash
memory
version
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
Fig. 32 Structure of bus interface related register
Data bus buffer control register
b0
b7
Data bus buffer enable bit
0 : P50–P53, P8 I/O port
1 : Data bus buffer enabled
Data bus buffer function selection bit
0 : Single data bus buffer mode (P4 7 functions as I/O port.)
1 : Double data bus buffer mode (P4 7 functions S1 input.)
OBF0 output selection bit
0 : OBF00 valid
1 : OBF01 valid
OBF00 output enable bit
0 : P42 functions as port I/O pin.
1 : P42 functions as OBF00 output pin.
OBF01 output enable bit
0 : P43 functions as port I/O pin.
1 : P43 functions as OBF01 output pin.
OBF10 output enable bit
0 : P46 functions as port I/O pin.
1 : P46 functions as OBF10 output pin.
Input level selection bit
0 : CMOS level input
1 : TTL level input
Reserved
Do not write “1” to this bit.
Data bus buffer status register 1
Output buffer full flag 1 (OBF 1)
Input buffer full flag 1 (IBF 1)
User definable flag (U12)
A01 flag (A01)
User definable flag (U14–U17)
This flag can be defined by user freely.
This flag indicates the condition of A0 1 status
when the IBF1 flag is set.
0 : Buffer empty
1 : Buffer full
0 : Buffer empty
1 : Buffer full
Data bus buffer status register 0
Output buffer full flag 0 (OBF 0)
Input buffer full flag 0 (IBF 0)
User definable flag (U 02)
A00 flag (A00)
This flag can be defined by user freely.
This flag indicates the condition of A0 0 status
when the IBF0 flag is set.
0 : Buffer empty
1 : Buffer full
0 : Buffer empty
1 : Buffer full
b0
b7
b0
b7
(DBBCON : address 002A 16)
(DBBSTS0 : address 0029 16)
User definable flag (U 04–U07)
(DBBSTS1 : address 002C 16)
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