EM91710A/B
TONE/PULSE SWITCHABLE DIALER
KEYBOARD ASSIGNMENT
C1
1
4
7
*or*/T
C2
2
5
8
0
C3
3
6
9
#
C4
P→T
F
P
RD
1). P→T
2). F
3). RD
4). P
5). */T
: In pulse mode, execute P→T function.
: Flash key.
: Redial key.
: Pause key.
: In pulse mode, execte P→T function
In tone mode, execte "*" key.
R1
R2
R3
R4
FUNCTIONAL BLOCK DIAGRAM
XMUTE
HFO
V
DD
COL1
COLUMN
INTERFACE CKT.
OUTPUT INTERFACE CKT.
PULSE
GENERATOR
PO
COL2
COL3
COL4
KERNEL CONTROL CKT.
DECODER &
DATA LATCH
LNB MEMORY
OSCI
OSCO
OSC.
DIVIDER
ROW/COLUMN
PROGRAMMING
COUNTER
ROW1
ROW2
ROW3
ROW4
ROW
INTERFACE CKT.
D/A CONVERTER
INPUT INTERFACE CKT.
TONE
DIALING SIGNAL OPTION :
a]:Flash time:
Row3 Row4 flash time(ms)
NR
NR
R
R
NR
R
NR
R
600
300
100
80
UR
UR
NR
R
PULSE
PULSE
10PPS
10PPS
40:60
33:66
b).
Row1 Row2
MODE PULSE RATE
R
R
NR
NR
NR
R
NR
R
TONE
TONE
PULSE
PULSE
20PPS
20PPS
HKS
c]:Tone function:
Col1
NR
R
Tone Duration
98 ms
83 ms
inter-Tone
Pause
98 ms
83 ms
d]:Key type select
Col2 *or*/T
select
NR
R
*
*/T
Note: NR:no resistance.
R : A resistance connect to Vss
(820KΩ typically)
UR: A resistance connect to V
DD
9.30.1997
2
* This specification are subject to be changed without notice.
V
SS
HFI
M/B
40:60
33:66
EMC [ ELAN MICROELECTRONICS CORP ]
