UPD30181 Datasheet, PDF (322/444 Pages) NEC – 64-/32-Bit Microprocessor

CHAPTER 16 KEYBOARD INTERFACE UNIT (KIU)
16.3.1 KIUDATn (0x0B00 0180 to 0x0B00 018E)
Remark
n = 0 to 7
KIUDAT0 (0x0B00 0180)
KIUDAT1 (0x0B00 0182)
KIUDAT2 (0x0B00 0184)
KIUDAT3 (0x0B00 0186)
KIUDAT4 (0x0B00 0188)
KIUDAT5 (0x0B00 018A)
KIUDAT6 (0x0B00 018C)
KIUDAT7 (0x0B00 018E)
Bit
Name
R/W
RTCRST
Other resets
15
Reserved
R
0
0
14
Reserved
R
0
0
13
Reserved
R
0
0
12
Reserved
R
0
0
11
Reserved
R
0
0
10
Reserved
R
0
0
9
Reserved
R
0
0
8
Reserved
R
0
0
Bit
Name
R/W
RTCRST
Other resets
7
RETDAT7
R
0
0
6
RETDAT6
R
0
0
5
RETDAT5
R
0
0
4
RETDAT4
R
0
0
3
RETDAT3
R
0
0
2
RETDAT2
R
0
0
1
RETDAT1
R
0
0
0
RETDAT0
R
0
0
Bit
15 to 8
7 to 0
Name
Reserved
RETDAT(7:0)
0 is returned when read
Scan data
1 : Key is released
0 : Key is pressed
Function
These registers reflect the state of the returned signals for the selected SCANOUT pins. Each register
corresponds to one SCANOUT pin as follows:
SCANOUT pin
SCANOUT7
SCANOUT6
SCANOUT5
SCANOUT4
SCANOUT3
SCANOUT2
SCANOUT1
SCANOUT0
KIUDAT register
KIUDAT7
KIUDAT6
KIUDAT5
KIUDAT4
KIUDAT3
KIUDAT2
KIUDAT1
KIUDAT0
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User’s Manual U14272EJ3V0UM