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VR4102 Datasheet(PDF) 429 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) 429 Page - NEC

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CHAPTER 21 KIU (KEYBOARD INTERFACE UNIT)
429
21.2.4 KIUWKS (0x0B00 0194)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
Reserved
T3CNT[4]
T3CNT[3]
T3CNT[2]
T3CNT[1]
T3CNT[0]
T2CNT[4]
T2CNT[3]
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
0
1
1
1
1
1
1
1
Other resets
0
1
1
1
1
1
1
1
Bit
D7
D6D5
D4D3D2
D1
D0
Name
T2CNT[2]
T2CNT[1]
T2CNT[0]
T1CNT[4]
T1CNT[3]
T1CNT[2]
T1CNT[1]
T1CNT[0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
1
1
1
1
1
1
1
1
Other resets
1
1
1
1
1
1
1
1
Bit
Name
Function
D[15]
Reserved
Write 0 when writing. 0 is returned after a read.
D[14..10]
T3CNT[4..0]
Wait time setting ((T3CNT[4..0] + 1) * 30
Ps)
11111 : 960
Ps
:
00001 : 60
Ps
00000 : RFU
D[9..5]
T2CNT[4..0]
Off time setting ((T2CNT[4..0] + 1) * 30
Ps)
11111 : 960
Ps
:
00001 : 60
Ps
00000 : RFU
D[4..0]
T1CNT[4..0]
Stabilization time setting ((T1CNT[4..0] + 1) * 30
Ps)
11111 : 960
Ps
:
00001 : 60
Ps
00000 : RFU
This register is used to set the wait time between when the key scan sequencer sets the KSCAN pin “High” during
a key matrix scan and when the status is read from the KPORT pin.
The T1CNT bit is used to set the stabilization time between when voltage is applied to the KSCAN pin and when
the key scan data is read.
The T2CNT bit is used to set the time between when the key data is read and when voltage applied to the
KSCAN pin is set to “OFF”.
The T3CNT bit is used to set the time between when voltage applied to the KSCAN pin is set to “OFF” and when
voltage can be again applied to the KSCAN pin.
The status of output from the KSCAN pins and the timing of KPORT sampling are shown below.



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