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VR4102 Datasheet(PDF) 424 Page - NEC

Part # VR4102
Description  64/32-bit Microprocessor
PDF  701 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

VR4102 Datasheet(HTML) 424 Page - NEC

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CHAPTER 21 KIU (KEYBOARD INTERFACE UNIT)
424
21.2.1 KIUDATn (0x0B00 0180 to 0x0B00 018A)
Remark
n = 0 to 5
KIUDAT0 (0x0B00 0180)
KIUDAT1 (0x0B00 0182)
KIUDAT2 (0x0B00 0184)
KIUDAT3 (0x0B00 0186)
KIUDAT4 (0x0B00 0188)
KIUDAT5 (0x0B00 018A)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
KEYDAT[15] KEYDAT[14] KEYDAT[13] KEYDAT[12] KEYDAT[11] KEYDAT[10]
KEYDAT[9]
KEYDAT[8]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
0
0
0
0
0
0
0
0
Other resets
0
0
0
0
0
0
0
0
Bit
D7
D6D5
D4D3D2
D1
D0
Name
KEYDAT[7]
KEYDAT[6]
KEYDAT[5]
KEYDAT[4]
KEYDAT[3]
KEYDAT[2]
KEYDAT[1]
KEYDAT[0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
0
0
0
0
0
0
0
0
Other resets
0
0
0
0
0
0
0
0
Bit
Name
Function
D[15..8]
KEYDAT[15..8]
Scan data from odd-numbered scans
D[7..0]
KEYDAT[7..0]
Scan data from even-numbered scans
These registers are used to hold key scan data.
Each KIU data register is able to hold the data from one scan operation.
How scan data is input to the registers is as below.
Bit
Register
KEYDAT[15..8]
KEYDAT[7..0]
KIUDAT0
Scan[1]
Scan[0]
KIUDAT1
Scan[3]
Scan[2]
KIUDAT2
Scan[5]
Scan[4]
KIUDAT3
Scan[7]
Scan[6]
KIUDAT4
Scan[9]
Scan[8]
KIUDAT5
Scan[11]
Scan[10]



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