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參數(shù)資料
| 型號： | S1C62920D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 1.3 MHz, MICROCONTROLLER, UUC63 |
| 封裝： | DIE-63 |
| 文件頁數(shù)： | 22/78頁 |
| 文件大?。?/td> | 874K |
| 代理商： | S1C62920D |
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S1C62920 TECHNICAL MANUAL
EPSON
21
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
4.5 Output Ports (R00–R03)
4.5.1 Configuration of output ports
The S1C62920 has 4 bits 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 Nch open drain output.
Further, the output ports R02 and R03 to be used as special output ports by the software setting.
Figure 4.5.1.1 shows the configuration of the output port.
VDD
VSS
Rxx
Data
bus
Address
Data register
Mask
option
Fig. 4.5.1.1 Configuration of output port
4.5.2 Mask option
(1) Output specification
Output specifications of the output ports can be selected with the mask option.
Output specifications for the output ports (R00–R03) enable selection of either complementary output
or Nch open drain output for each of the 4 bits.
The Nch open drain output is suitable for the common output for key matrix and the other outputs.
However, even when Nch open drain output is selected, voltage exceeding source voltage must not be
applied to the output port.
Select complementary output set in default for unused output port.
(2) Special output
In addition to the regular DC output, special output can be selected for the output ports R02 and R03 as
shown in Table 4.5.2.1 with the mask option. Figure 4.5.2.1 shows the configuration of the special
output.
Table 4.5.2.1 Special output
Terminal
R03
R02
Special output
BZ
FOUT
Fig. 4.5.2.1 Configuration of special output
Data
bus
Register
R01
BZ
R03 output
Register
R03
Mask option
VDD
FOUT
R02 output
Register
R02
Mask option
VDD
R01 output
Register
R00
R00 output
At initial reset, the output terminals are set to
low (VSS).
When R02 and R03 are used as the special
output ports, turn the signals ON or OFF using
the output data register R02 and R03.
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