參數(shù)資料
型號: 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
文件頁數(shù): 49/119頁
文件大?。?/td> 865K
代理商: S1C63455D
S1C63455 TECHNICAL MANUAL
EPSON
27
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
4.4 Input Ports (K00–K03)
4.4.1 Configuration of input ports
The S1C63455 has four bits general-purpose input ports. Each of the input port terminals (K00–K03)
provides internal pull-up resistor. Pull-up resistor can be selected for each bit with the mask option.
Figure 4.4.1.1 shows the configuration of input port.
Kxx
Mask option
Address
VDD
Interrupt
request
Data
bus
VSS
Fig. 4.4.1.1 Configuration of input port
Selection of "With pull-up resistor" with the mask option suits input from the push switch, key matrix,
and so forth. When "Gate direct" is selected, the port can be used for slide switch input and interfacing
with other LSIs.
4.4.2 Interrupt function
All four bits of the input ports (K00–K03) provide the interrupt function. The conditions for issuing an
interrupt can be set by the software. Further, whether to mask the interrupt function can be selected by
the software.
Figure 4.4.2.1 shows the configuration of K00–K03 interrupt circuit.
Data
bus
Input comparison
register (KCP00)
K00
Interrupt
request
Interrupt selection
register (SIK00)
Address
Interrupt factor
flag (IK0)
K01
K02
K03
Interrupt mask
register (EIK0)
Address
Fig. 4.4.2.1 Input interrupt circuit configuration
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