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參數(shù)資料
| 型號(hào)： | NT6861 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-Bit Microcontroller for Monitor |
| 中文描述： | 8位微控制器的監(jiān)控 |
| 文件頁數(shù)： | 19/44頁 |
| 文件大?。?/td> | 455K |
| 代理商： | NT6861 |
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NT6861
19
11.3.
Port2: P20 - P27
Port2, an 8-bit bi-directional I/O port (Figure 10), which may be programmed as an input or output pin by the software control.
When setting the PT2DIR control bit to '0', its corresponding pin will act as output pin. Clearing PT2DIR bit to '1', acts as an
input pin. When programmed as an input, it has an internal pull-up resistor. When programmed as an output, the data to be
output is latched to the port data register and output to the pin with push-pull structure. If programmed as an output pin, user
can read out its correspondent control bit about what user has written before. If programmed as an input pin, user can read out
what the I/O pin status outside. This port acts as an input port after reset.
Addr.
Register
INIT
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
$0002
PT2DIR
FFH
P27OE
P26OE
P25OE
P24OE
P23OE
P22OE
P21OE
P20OE
W
$0003
PT2
FFH
P27
P26
P25
P24
P23
P22
P21
P20
RW
11.4. Port3: P30 - P31
Port3 is an 2 bit bi-directional open-drain I/O port (Figure 11). Each pin of Port3 may be bit programmed as an input or output
pin with open drain structure. When Port3 works as an output, the data to be output is latched to the port data register and
output to the pin. For Port3 pins that have '1's written to them, user must connect PORT3 with external pulled-up resistor and
then PORT3 can be used as input (the input signal can be read). This port outputs high after reset .
P30, BP3 include Schmitt Trigger buffer for noise immunity and can be configured as the I
2
C pins SDA & SCL respectively. If
set ENDDC
to LOW in IISTS control register, P30, P31 will act as SDA, SCL respectively. After the chip is reset, ENDDC
will
be in HIGH and PORT3 will act as I/O pins.
Addr.
Register
INIT
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
$0004
PT3
03H
-
-
-
-
-
-
P31
P30
RW
$0015
II STS
0FH
-
-
START
START
STOP
STOP
ENDDC
TRX
RXAK
R
W
I/O
Data Out
Data In
Figure 11. Open Drain I/O Structure
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相關(guān)代理商/技術(shù)參數(shù) |
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| NT6861U | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller for Monitor |
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| NT68625 | 制造商:NAIS 制造商全稱:Nais(Matsushita Electric Works) 功能描述: |
| NT6862U | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller for Monitor |
| NT68667 | 制造商:NAIS 制造商全稱:Nais(Matsushita Electric Works) 功能描述:NOVATEK顯示器驅(qū)動(dòng)芯片 |
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