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GMS81032 bảng dữ liệu(PDF) 74 Page - Hynix Semiconductor

tên linh kiện GMS81032
Giải thích chi tiết về linh kiện  8-BIT SINGLE CHIP MICROCOMPUTERS
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nhà sản xuất  HYNIX [Hynix Semiconductor]
Trang chủ  http://www.skhynix.com/kor/main.do
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GMS81032 bảng dữ liệu(HTML) 74 Page - Hynix Semiconductor

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5 - 9
5.7 Key Scan Input Processing
Key Scan Interrupt is generated by detecting low Input from each Input pin (R0, R1) or
standby(SLEEP, STOP) release signal. Key Scan ports are all 16bit which are
controlled by Stand-by Mode Release Register (SMRR0, SMRR1). Key Input is
considered as Interrupt, therefore, KSCNE bit of IEHN should be set for correct interrupt
executing, SLEEP mode and STOP mode, the rest of executing is the same as that of
external Interrupt. Each SMRR Register bit is allowed for each port(for Bit=0, no Key
Input, for Bit=1, Key Input available). At reset, SMRR becomes ¡È00H¡È. So, there is
no Key Input source.
R00
R01
.
.
R07
R10
R11
.
.
R17
R0 port
Selection Logic
R1 port
Selection Logic
SMRR0
W <00DCH>
W <00DDH>
SMRR1
7
0
7
0
<Key Scan Block>
Chapter 5. Interrupt
Internal
Key Scan
Interrupt



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