EM91240AP EMC [ELAN Microelectronics Corp], EM91240AP Datasheet - Page 2

• Manufacturer Part Number: EM91240AP
• Description: TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
• Manufacturer: EMC [ELAN Microelectronics Corp]

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