參數(shù)資料
型號: M38869MFA-XXXGP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80
封裝: 0.65 MM PITCH, PLASTIC, QFP-80!
文件頁數(shù): 47/113頁
文件大?。?/td> 1871K
代理商: M38869MFA-XXXGP
36
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 33 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 (P47 functions as I/O port.)
1 : Double data bus buffer mode (P47 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 (OBF1)
Input buffer full flag 1 (IBF1)
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 A01 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 (OBF0)
Input buffer full flag 0 (IBF0)
User definable flag (U02)
A00 flag (A00)
This flag can be defined by user freely.
This flag indicates the condition of A00 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 002A16)
(DBBSTS0 : address 002916)
User definable flag (U04–U07)
(DBBSTS1 : address 002C16)
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