參數(shù)資料
型號： TLC154
廠商： Electronic Theatre Controls, Inc.
英文描述： EPROM/ROM-Based 8-Bit Microcontroller Series
中文描述： 存儲器/基于ROM的8位微控制器系列
文件頁數(shù)： 16/50頁
文件大?。?/td> 552K
代理商： TLC154
2.2 I/O Ports
Port A, port B and port C are bi-directional tri-state I/O ports. Port A is a 4-pin I/O port. Port B and port C are 8-pin I/O
ports.
All I/O pins (IOA<3:0>, IOB<7:0> and IOC<7:0>) have data direction control registers (IOSTA, IOSTB, IOSTC)
which can configure these pins as output or input.
IOB<7:0> have its corresponding pull-high control bits (PHCON register) to enable the weak internal pull-high. The
weak pull-high is automatically turned off when the pin is configured as an output pin.
IOA<3:0> and IOB<3:0> have its corresponding pull-down control bits (PDCON register) to enable the weak internal
pull-down. The weak pull-down is automatically turned off when the pin is configured as an output pin.
IOB<7:0> have its corresponding open-drain control bits (ODCON register) to enable the open-drain output when
these pins are configured to be an output pin.
IOA0 and IOA1 are the R-option pins enabled by setting the ROC bit (PCON<4>). When the R-option function is
used, it is recommended that IOA0 and IOA1 are used as output pins, and read the status of IOA0 and IOA1 before
these pins are configured to be an output pin.
IOB<7:0> also provides the input change interrupt/wake-up function. Each pin has its corresponding input change
interrupt/wake-up enable bits (WUCON) to select the input change interrupt/wake-up source.
The IOB0 is also an external interrupt input signal by setting the EIS bit (PCON<6>). In this case, IOB0 input change
interrupt/wake-up function will be disabled by hardware even if it is enabled by software.
FIGURE 2.3: Block Diagram of I/O PINs
IOA3 ~ IOA0, IOC7 ~ IOC0 :
Pull-down is not shown in the figure
D Q
IOST
Latch
> EN
Q
I/O PIN
D Q
DATA
Latch
> EN
Q
Data bus
IOST R
WR PORT
RD PORT
TLC
TLC156
Rev0.95 Nov 20, 2003
P.2/TLC156
相關(guān)PDF資料
PDF描述
TLC154D EPROM/ROM-Based 8-Bit Microcontroller Series
TLC154EP EPROM/ROM-Based 8-Bit Microcontroller Series
TLC154ER EPROM/ROM-Based 8-Bit Microcontroller Series
TLC154P EPROM/ROM-Based 8-Bit Microcontroller Series
TLC154R EPROM/ROM-Based 8-Bit Microcontroller Series
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