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參數(shù)資料
| 型號(hào)： | S1C63455D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, UUC105 |
| 封裝： | DIE-105 |
| 文件頁(yè)數(shù)： | 53/119頁(yè) |
| 文件大小： | 865K |
| 代理商： | S1C63455D |
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S1C63455 TECHNICAL MANUAL
EPSON
31
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
4.5 Output Ports (R00–R03)
4.5.1 Configuration of output ports
The S1C63455 has 4 bits of general output ports.
Output specifications of the output ports can be selected individually with the mask option. Two kinds of
output specifications are available: complementary output and N-channel open drain output.
Figure 4.5.1.1 shows the configuration of the output port.
VDD
VSS
Rxx
Data
bus
Address
Data register
Address
High impedance
control register
Mask option
Fig. 4.5.1.1 Configuration of output port
The R02 and R03 output terminals are shared with special output terminals (TOUT, FOUT), and this
function is selected by the software.
At initial reset, these are all set to the general purpose output port.
Table 4.5.1.1 shows the setting of the output terminals by function selection.
Table 4.5.1.1 Function setting of output terminals
Terminal
name
R00
R01
R02
R03
Terminal status
at initial reset
R00 (High output)
R01 (High output)
R02 (High output)
R03 (High output)
Special output
TOUT
FOUT
R00
R01
TOUT
FOUT
When using the output port (R02, R03) as the special output port, the data register must be fixed at "1"
and the high impedance control register must be fixd at "0" (data output).
4.5.2 Mask option
Output specifications of the output ports can be selected with the mask option.
The output specifications of the output ports R00–R03 can be selected from either complementary output
or N-channel open drain output individually (in 1-bit units).
However, when N-channel open drain output is selected, do not apply a voltage exceeding the power
supply voltage to the output port.
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