EM91240 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
EM91240
Pin Assignment
EM91240BP
EM91240AP
1
2
20
19
18
17
16
15
14
13
12
11
COL5
COL4/KT
COL3
COL2
COL1
XIN
PM
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
COL5
COL4/KT
COL3
PM
PO
PO
3
ROW4
ROW3
ROW2
ROW1
HKS
ROW4
ROW3
ROW2
ROW1
HKS
4
COL2
5
COL1
6
XIN
7
XOUT
XMUTE
VSS
XOUT
XMUTE
VSS
8
VDD
DTMF
HFO
VDD
DTMF
9
10
HFI
EM91240CK
NC
COL5
COL4/KT
COL3
COL2
COL1
XIN
1
2
22
21
20
19
18
17
16
15
14
13
12
SDO
PM
3
PO
4
ROW4
ROW3
ROW2
ROW1
HKS
5
6
7
XOUT
XMUTE
VSS
8
9
VDD
DTMF
HFO
10
11
HFI
Keyboard Arrangement
Type A
Type B
COL1
COL2
COL3
COL4/KT
SAVE
F
COL5
ST
COL1
COL2
COL3
COL4/KT
SAVE
F
COL5
ROW1
ROW2
ROW3
ROW4
1
4
2
5
8
0
3
6
9
#
ROW1
ROW2
ROW3
ROW4
1
4
7
*
2
5
8
0
3
6
9
#
P→T
7
A
A
*/T
RD/P
RD/P
ST
FUNCTIONAL BLOCK DIAGRAM
HFO
SDO
PM
XMUTE
COL1
Row/Column
programming counter
Keyboard
COL2
Output circuit
interface
COL3
COL4/KT
COL5
(column)
latch
&
decoder
Memory
(Melody)
D/A
converter
DTMF
XIN
Oscillator
XOUT
Timing/Control circuit
ROW1
ROW4
Keyboard
interface
(Row)
PO
Pulse
generator
Input circuit
HFI HKS
VDD
VDD
10.1.1997
* This specification are subject to be changed without notice.
2
ELAN [ ELAN MICROELECTRONICS CORP ]
