參數(shù)資料
型號: S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 100/161頁
文件大?。?/td> 1037K
代理商: S1C621A0F0A0100
I-18
EPSON
S1C621A0 TECHNICAL HARDWARE
CHAPTER 3: PERIPHERAL CIRCUITS (Input Ports)
3.4 Input Ports (K00–K03, K10–K13)
The S1C621A0 has two 4-bit general-purpose input ports
(K00–K03 and K10–K13). As shown in Figure 3.4.1, each
input port pin is provided with a pull-up and a feedback
pull-up so that the port is suitable for push switch or key
matrix switch input. As the pull-up can be removed by
using mask option, the input port can also be used for slide
switch input or interface with another LSI.
Table 3.4.1 I/O Memory Map
Input port data can be read on a 4-bit basis (K00–K03, K10–
K13) addressed 0FAH and 0FBH. Table 3.4.1 shows data
assignments to the input port bits.
Input port data
Fig. 3.4.1
Input Port Configuration
VDD
K
Data bus
Input
control
V
Interrupt
request
Mask option
SS
nm
Address
Comment
Register
D3
D2
D1
D0
Name
Init
1
0
0FAH
0FBH
K03
K02
K01
K00
K13
K12
K11
K10
R
K03
K02
K01
K00
K13
K12
K11
K10
High
Low
Input port (fall : interrupt factor)
High
Low
Input port (fall : interrupt factor)
Note: Init = value at initial reset, – = not set on the circuit
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