W90P710_05 Datasheet, PDF (494/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
74138
16x8 keys
matrix
ROW[15:0] COL[7:0]
ROW[3:0]
W90P710
COL[0]
COL[1]
COL[2]
COL[3]
ENCODER
A0 IN[7:0]
A1
A2
GS
74148
keypad I/F with 8:3 encoder
Fig. 7.21.1 Keypad Interface with row decoder and column encoder
Keypad Controller 3-keys Configuration Register (KPI3KCONF)
REGISTER
KPI3KCONF
ADDRESS
0xFFF8_8004
R/W
W/R
DESCRIPTION
three-key
register
configuration
RESET VALUE
0x0000_0000
31
30
29
28
27
26
25
24
RESERVED
EN3KY ENRST
23
22
21
20
19
18
17
16
RESERVED
K32R
K32C
15
14
13
12
11
10
9
8
RESERVED
K31R
K31C
7
6
5
4
3
2
1
0
RESERVED
K30R
K30C
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