EM91220 데이터 시트보기 (PDF) - ELAN Microelectronics
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EM91220 Datasheet PDF : 20 Pages
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EM91220
Pin Assignment
EM91220AP
COL5 1
COL4/KT 2
COL3 3
COL2 4
COL1 5
XIN 6
XOUT 7
XMUTE 8
VSS 9
18 PM
17 PO
16 ROW4
15 ROW3
14 ROW2
13 ROW1
12 HKS
11 VDD
10 DTMF
EM91220 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
EM91220BP
COL5 1
COL4/KT 2
COL3 3
COL2 4
COL1 5
XIN 6
XOUT 7
XMUTE 8
VSS 9
HFI 10
20 PM
19 PO
18 ROW4
17 ROW3
16 ROW2
15 ROW1
14 HKS
13 VDD
12 DTMF
11 HFO
EM91220CK
NC 1
COL5 2
COL4/KT 3
COL3 4
COL2 5
COL1 6
XIN 7
XOUT 8
XMUTE 9
VSS 10
HFI 11
22 SDO
21 PM
20 PO
19 ROW4
18 ROW3
17 ROW2
16 ROW1
15 HKS
14 VDD
13 DTMF
12 HFO
Keyboard Arrangement
Type A
ROW1
ROW2
ROW3
ROW4
COL1
1
4
7
*/T
COL2
2
5
8
0
COL3
3
6
9
#
COL4/KT
SAVE
F
A
RD/P
COL5
ST
Type B
ROW1
ROW2
ROW3
ROW4
COL1
1
4
7
*
COL2
2
5
8
0
COL3
3
6
9
#
COL4/KT
SAVE
F
A
RD/P
COL5
P→T
ST
FUNCTIONAL BLOCK DIAGRAM
COL1
COL2
COL3
COL4/KT
COL5
XIN
XOUT
ROW1
ROW4
Keyboard
interface
(column)
Oscillator
Keyboard
interface
(Row)
SDO HFO PM
Output circuit
XMUTE
Row/Column
programming counter
Memory
(Melody)
latch
&
decoder
D/A
converter
DTMF
Timing/Control circuit
Pulse
PO
Input circuit
generator
VDD
HFI HKS
VDD
* This specification are subject to be changed without notice.
10.1.1997 2
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