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參數(shù)資料
| 型號(hào)： | 38C1 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | DIODE ZENER SINGLE 200mW 24Vz 0.05mA-Izt 0.05 0.05uA-Ir 18.2 SOD-323 3K/REEL |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 13/59頁(yè) |
| 文件大?。?/td> | 1063K |
| 代理商： | 38C1 |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C1 Group
13
I/O PORTS
Direction Registers (Ports P2–P6)
The I/O ports (P2
–
P6) have direction registers which determine
the input/output direction of each individual pin.
When
“
0
”
is written to the bit corresponding to a pin, that pin be-
comes an input pin. When
“
1
”
is written to that bit, that pin be-
comes an output pin.
If data is read from a pin set to output, the value of the port output
latch is read, not the value of the pin itself. Pins set to input are
floating. If a pin set to input is written to, only the port output latch
is written to and the pin remains floating.
Pull-up/Pull-down Control
By setting the PULL register (address 0033
16
), I/O ports can con-
trol pull-up/pull-down (pins also used as segment output pin: pull-
down, other pins: pull-up). Pull-up/pull-down of pins are performed
by setting the PULL register to
“
1
”
.
However, the contents of PULL register does not affect ports pro-
grammed as the output ports.
Input port P0 and I/O port P2 are pulled-down in the initial state.
Also, the pull-down setting is invalid for pins set to segment output
with the segment output enable register (address 0038
16
).
Fig. 11 Structure of PULL register
b7
b
0
P
(
U
P
L
L
L
L
r
e
:
g
a
i
s
d
t
e
r
r
s
U
d
e
s
0
0
3
3
1
6
,
i
n
i
t
i
a
l
v
a
l
u
e
:
0
7
1
6
)
P2
0
–
P2
3
pull-down
P2
4
–
P2
7
pull-down
P3
0
–
P3
4
pull-up
P4
4
–
P4
7
pull-up
P5
0
–
P5
3
pull-up
P5
4
–
P5
7
pull-up
P6
0
–
P6
4
pull-up
Note
Note: These ports are invalid when selecting SEG.
P0
0
–
P0
7
pull-down
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 38C2 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 38C3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:38C3 Group USER＇S MANUALHardware Manual & Device User＇s Manual 1733K/APR.12.99 |
| 38C3_M | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
| 38C8 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 38CAV4E | 功能描述:保險(xiǎn)絲 38KV 4A CAV RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險(xiǎn)絲類型:Fast Acting 保險(xiǎn)絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類型:SMD/SMT 系列:485 |
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