BL1102series
Description
BL1102 Series is a single chip dialer IC using Si-gate CMOS process, it can provide signal for either
Pulse or double Tone with multi-frequency dialing. It features key tone and hands-free dialing, “0,”9”
dialing latch with first number, 2array 32-digit number memory re-dialing, and 13-array 16-digit number
memory etc.
Features
Operating voltage: 2.0 ~ 5.5V
Double Tone/Pulse selection with switch, pulse can be switched to double tone by pressing*/T key.
3.579545MHz crystal or ceramic resonator is used
Power on reset on chip
Minimum tone output duration: 100 ms
2 arrays of 32-digit number memory used for re-dialing and memory dialing respectively
3 arrays of 16-digit number single key dialing memory
10 arrays of 32-digit number double key dialing memory
Pulse break/make ratio can be 3/2 or 2/1, both alternative, and pulse speed is 10PPS
Flash Time: 98ms, 305ms, 6000ms
Minimum tone output width: 93ms, minimum tone interval: 93ms
Key tone output used for confirming the key pressed is right
Pulse, P→T (Pulse to Tone) can be stored as a digit in memory
Easy operation with one-key redial, memory, pause and etc.
Standard 5×5 keyboard used
Key “Mute” used for mute talking
The dial-out staring with number “0” or “9”can be locked and chosen by pin.
CD-operating key
20 and 24 PDIP plastic Package
Application
Used as dialing circuit in telephone, complete relevant functions.
Block Diagram
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Wrote by 2006
Total
9 Pages
BL1102series
Known from the above block diagram, it mainly made up of system clock generator, keyboard interface,
data code, random storing, read/write counter, address lock and storing, system control logic, pulse
generator, data/mode converter and double tone generator and other circuits.
。
Pin Description
Symbol
Row/colum
n input
X T,X T
T/P MUTE
22 Pin
1-4,18-
22
6,7
8
24 Pin
1-4,20-
24
6,7
8
I/0
O
I/0
I
Function
A valid key entry is defined by a single row being
Connected to a single column
Oscillation I/O
The T/P MUTE is a conventional CMOS N-channel
open drain output. When dialing and flash, the
output is
and will turn down the talking network.
Dialing mode selection.. When pin is connected to
VSS, it is double tone multi-frequency mode when it is
connected to VDD; it is pulse mode (10ppS).
The pin is the hook switch input HKS =1, on HOOK
state, chip in sleeping mode, no operation. HKS =0, on
HOOK state，enable chip on normal operation.
Break/make ratio, pin selection.
B/M=1, ratio is 60/40;
B/M=0, ratio is 66/33.
Power and power ground input
Inverter output. Dialing under double tone mode,
pin is high voltage； dialing under pulse mode, the
if
pin is low voltage.
Hands-free control details can be seen in table2.
Key tone signal output. The frequency is1.2KHz.
Once the pin is locked, dialing starting with
"0" or "9" and all the key input afterwards will
become invalid. It will recover the original state
after on hook
LOCK Pin
Function
VDD
“0”和“9”dialing lim it
Floating
Normal
VSS
“0”dialing lim it
Not available
The DP/C5 is a conventional CMOS N-channel
open drain output. Under tone state. Output will
keep high; Under pulse state, output dialing pulse.
Double tone multifrequency signal output
MODE
14
16
I
HKS
9
9
I
B/M
VDD, VSS
X MUTE
HFI, HFO
KT
16
1 7, 5
13
--
12
18
19, 5
15
12，13
14
I
I
O
I/O
O
LOCK
15
(BL1102L)
17
(BL1102AL)
I
NC
DP / C5
15
(BL1102)
10
17
(BL1102A)
10
I
O
DTMF
11
11
O
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Wrote by 2006
Total
9 Pages
BL1102series
Table1. Circuit Function
Type
Pulse (PPS)
10
10
10
10
Flash (ms)
98 / 305 / 600
98 / 305 / 600
98 / 305 / 600
98 / 305 / 600
Break/Make
Ratio (B/M)
Hands-free
Lock
Control
N
N
Y
Y
Assembly
(PDIP)
22
24
22
24
BL1102
BL1102A
BL1102L
BL1102AL
Pin Selection
Pin Selection
Pin Selection
Pin Selection
N
Y
N
Y
Table 2
Current State
Hook switch
HFO
－
On hook ( HKS=1)
Off hook ( HKS=0)
On hook ( HKS=1)
off hook ( HKS=0)
off hook ( HKS=0)
Low
High
High
－
Low
High
input
HFI
↓
HFI
↓
HFI↓
Off hook
on hook
On hook
Next State
Hands-free output
dialing
( HFO )
High
Y
Low
－
Low
Low
Low
High
Y
Y
－
Y
Function Description
Keyboard Operation
R1
R2
R3
R4
R5
C1
1
4
7
*/T
RD
C2
2
5
8
0
S
C3
3
6
9
#
A
C4
EM1
EM2
EM3
SAVE
P
DP/C5
MUTE
CD
F1
F2
F3
MUTE: mute on/off
P:
pause
CD: call disconnect
RD:
one-key redial
S:
double-key store
A:
自动拨号键
* /T: *&P
→
T key
EM1-EM3:
16 digit emergency number store disconnect
SAVE: 32
½备忘存储键
F1, F2, F3:
flash time 98/305/600ms store
#:
Invalid under pulse state while refer to double tone multifrequency of the
corresponding row and column
Genera l Dialing
b . Dialing length is unlimited, but the re-dial is inhibited if it oversteps 32 digits
Re-dialing
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BL1102series
“Pause” key operation
a . Pause function can be stored in memory storage.
b . Pause function can be performed when general dialing or re-dial or memory dialing.
pulse
→
tone mode convert ( * / T )
a . If mode switch is set as pulse，output signal will be
：
D1，D2，…，Dn，pause (3.1 minutes)
，D1’,
D2’,
…，Dn’
( pulse )
( tone )
b . If the mode switch is set as tone, output signal will be
：
D1，D2，…
，Dn，*/T，D1’,
D2’，…，Dn’
( tone )
( tone ) ( tone )
c . If the tone mode remains since the number is dialed out, pulse mode can be recovered as long as do on-hook
operation.
FLASH
a . “flash” key can not be stored in the memory , but it enjoys the most high priority in all keyboard functions.
b . after pressing “ flash” key，dialer will recover to the original status.
Number Storage
a . Dialing out D1，D2，… Dn first, then press the storage key S
b . D1，D2，…，Dn numbers are stored in the position “ Mn or Ln”and dialed out.
a . D1, D2，…，Dn are stored in Mn or L n but will not be dialed out.
b . P and * / T key can be stored in the memory as one digit
，P
key indicates “pause”.
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BL1102series
c . Once the storage function is finished or the state of hook switch changes，the storage mode will be released.
Memory dialing
a . One-key dial：
b . Two-key dial：
“Save” Key
a.
will be stored in the memory.
b.
will be dialed out.
CD
Press
CD
，one
pulse output will make call disconnected
，and
make the system recover to the original status.
MUTE
Press “ MUTE”, mute output will be generated.
Mixed dialing
Dialing with “Save” key is valid only being first pressed after off hook, and the second serial numbers can be
dialed after the number is sent out.
Absolute Maximum Rating
Parameter
DC Supply Voltage
Symbol
V
DD
~ V
S S
V
IL
Input / output Voltage
V
IH
V
DL
V
DH
Power-Dissipation
Operating Temperature
Storage Temperature
P
D
T
OPR
T
STG
Rating
-0.3 ~ +7.0
V
SS
-0.3
V
DD
+0.3
V
SS
-0.3
V
DD
-0.3
120
-20 ~+70
-55 ~+150
Unit
V
V
V
V
V
mW
o
o
C
C
http://www.belling.com.cn
-5-
8/22/2006
Wrote by 2006
Total
9 Pages
stm32/stm8
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