W90P710CD Datasheet, PDF (505/552 Pages) Winbond – 32-BIT ARM7TDMI-BASED MCU

W90P710CD/W90P710CDG
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. 6.21.1 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
23
22
RESERVED
15
14
RESERVED
7
6
RESERVED
29
28
27
RESERVED
21
20
19
K32R
13
12
11
K31R
5
4
3
K30R
- 506 -
26
25
24
EN3KY ENRST
18
17
16
K32C
10
9
8
K31C
2
1
0
K30C