参数资料
型号: S1C63158B0A010R
元件分类: 微控制器/微处理器
英文描述: 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, PBGA
文件页数: 96/159页
文件大小: 1200K
代理商: S1C63158B0A010R
S1C63808 TECHNICAL MANUAL
EPSON
33
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
4.5 Output Ports (R00–R03 and R10–R13)
4.5.1 Configuration of output ports
The S1C63808 has eight 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 P-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 R01, R02 and R03 output terminals are shared with special output terminals (BZ, 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
R10–R13
Terminal status
at initial reset
R00
(LOW output)
R01
(LOW output)
R02
(LOW output)
R03
(LOW output)
R10–R13 (LOW output)
Special output
BZ
R00
BZ
R10–R13
TOUT
R00
TOUT
R10–R13
FOUT
R00
FOUT
R10–R13
When using the output port (R01, R02, R03) as the special output port, the data register must be fixed at
"1" and the high impedance control register must be fixed at "0" (data output).
Note: If an output terminal (including a special output terminal) of this IC is used to drive an external
component that consumes a large amount of current such as a bipolar transistor, design the
pattern of traces on the printed circuit board so that the operation of the external component does
not affect the IC power supply. Refer to <Output Terminals> in Section 5.3, "Precautions on
Mounting", for more information.
4.5.2 Mask option
Output specifications of the output ports are selected by mask option.
Either complementary output or P-channel open drain output can be selected individually (in 1-bit units).
However, when P-channel open drain output is selected, do not apply a voltage exceeding the power
supply voltage to the output port.
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