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參數(shù)資料
| 型號(hào)： | M37640M4T |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁數(shù)： | 12/48頁 |
| 文件大小： | 563K |
| 代理商： | M37640M4T |
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MITSUBISHI
ELECTRIC
12
MITSUBISHI MICROCOMPUTERS
7630 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Port Pull-up/pull-down Function
Each pin of ports P0 to P4 except P1
1
is equipped with a program-
mable pull-up transistor. P3
2
/CRX and P4
0
/KW
0
to P4
7
/KW
7
are
equipped with programmable pull-down transistors as well. The
pull-up function of P0 to P3 can be controlled by the corresponding
port pull-up control registers (see Structure of port pull-up/down
control registers). The pull-up/down function of ports P3
2
and P4
can be controlled by the corresponding port pull-up/pull-down regis-
ters together with the polarity control register (see Structure of
polarity control register).
Fig. 11
Structure of port pull-up/down control registers
Fig. 12
Structure of polarity control register
P3
j
pull-up transistor control bit (j = 0, 1)
P3
2
pull-up/down transistor control bit
P3
j
pull-up transistor control bit (j = 3, 4)
Not used (“0” when read, do not write “1”)
Pi
j
pull-up transistor control bit (j = 0 to 7)
0 :
Pull-up transistor disabled
1 :
Pull-up transistor enabled
7
0
Port Pi pull-up control register (address 0028
16
+ i) (i = 0, 2)
PUP0, PUP2
7
0
Port P1 pull-up control register (address 0029
16
)
PUP1
7
0
Port P3 pull-up control register (address 002B
16
)
PUP3
P4
j
pull-up/down transistor control bit (j = 0 to 7)
7
0
Not used (“0” when read, do not write “1”)
P1
j
pull-up transistor control bit (j = 2 to 7)
0 :
1 :
Pull-up/down transistor disabled
Pull-up/down transistor enabled
Port P4 pull-up/down control register (address 002C
16
)
PUP4
Key-on wake-up polarity control bit
0 :
Low level active
1 :
High level active
CAN module dominant level control bit
0 :
Low level dominant
1 :
High level dominant
Not used (undefined when read)
7
0
Polarity control register (address 002F
16
)
PCON
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