HM91710A 데이터 시트보기 (PDF) - ELAN Microelectronics
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HM91710A Datasheet PDF : 19 Pages
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HM91710A/B
TONE/PULSE SWITCHABLE DIALER
KEYBOARD ASSIGNMENT
C1 C2 C3
R1
1
23
R2
4
56
R3
7
89
R4
*
0#
C4
P→T
F
P
RD
FUNCTIONAL BLOCK DIAGRAM
1). P→T : In pulse mode, execute P→T function.
2). F : Flash key.
3). RD : Redial key.
4). P : Pause key.
COL1
COL2
COL3
COL4
OSCI
OSCO
ROW1
ROW2
ROW3
ROW4
OSC.
DIVIDER
OUTPUT INTERFACE CKT.
PULSE
GENERATOR
PO
LNB MEMORY
INPUT INTERFACE CKT.
DECODER &
DATA LATCH
ROW/COLUMN
PROGRAMMING
COUNTER
D/A CONVERTER
TONE
DIALING SIGNAL OPTION :
a]:Flash time:
Row3 Row4 flash time(ms)
NR
NR
600
NR
R
300
R
NR
100
R
R
80
b).
Row1 Row2 MODE PULSE RATE
R
NR TONE
R
R TONE
NR NR PULSE
20PPS
NR
R PULSE
20PPS
UR NR PULSE
10PPS
UR
R PULSE
10PPS
M/B
40:60
33:66
40:60
33:66
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
* Note: NR:no resistance.
R : A resistance connect to Vss (820KΩ typically)
R
*/T
UR: A resistance connect to V DDDD
* This specification are subject to be changed without notice.
1.7.2002 2
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