INTEGRATED CIRCUITS
PCD3332-2; PCD3332-3; PCD3332-S
Multistandard pulse/tone repertory diallers/ringers
Product specification |
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1997 Jan 13 |
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File under Integrated Circuits, IC03 |
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Philips Semiconductors Product specification
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Multistandard pulse/tone repertory |
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PCD3332-2; PCD3332-3; |
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diallers/ringers |
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PCD3332-S |
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CONTENTS |
10.3 |
SO |
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1 |
FEATURES |
10.3.1 |
Reflow soldering |
10.3.2 |
Wave soldering |
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2 |
GENERAL DESCRIPTION |
10.3.3 |
Repairing soldered joints |
3 |
ORDERING INFORMATION |
11 |
DEFINITIONS |
4 |
PINNING |
12 |
LIFE SUPPORT APPLICATIONS |
4.1PCD3332-2
4.2PCD3332-3
4.3PCD3332-S
5 |
FUNCTIONAL DESCRIPTION |
5.1Pin description
5.1.1Supply terminals (VDD and VSS)
5.1.2Oscillator input/output (XTAL1 and XTAL2)
5.1.3Chip enable and frequency discriminator input (CE/FDI)
5.1.4Cradle switch input (CSI)
5.1.5Reset input (RESET)
5.1.6Pulse dial and flash output (DP/FL)
5.1.7Mute output (MUTE)
5.1.8DTMF output (TONE)
5.1.9Register recall (EARTH)
5.1.10Ringer Tone Enable (RTE: PCD3332-2/S)
5.1.11Hands-Free/Ringer Tone Enable
(HF/RTE: PCD3332-3)
5.1.12Volume control outputs (VOL1 and VOL2)
5.1.13Ringer volume settings
5.1.14Dial Mode Output /Key-Tone Enable (DMO/KTE)
5.1.15Keyboard inputs/outputs
5.2Keyboards
5.2.1Keyboard function keys
5.2.2Diode options
5.2.3Hook modes
6 |
OPERATING PROCEDURES |
6.1Operating modes
6.1.1On-hook mode or ringer mode
6.1.2Dial mode
6.1.3Reset delay time
6.1.4Programming mode
6.1.5Ringer mode (PCD3332-2)
6.1.6Ringer mode (PCD3332-3/S)
7LIMITING VALUES
8CHARACTERISTICS
9PACKAGE OUTLINES
10SOLDERING
10.1Introduction
10.2DIP
10.2.1Soldering by dipping or by wave
10.2.2Repairing soldered joints
1997 Jan 13 |
2 |
Philips Semiconductors |
Product specification |
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Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
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1 FEATURES
∙Pulse, DTMF and VT ‘mixed mode’ dialling
∙13 number repertory dial, up to 32 digits per number
–10 one-touch redial or 3 one-touch plus 10 two-touch
–250 digits maximum storage
∙Last number redial up to 32 digits
∙Repertory and redial memory integrity check (memory contents check)
∙Notepad memory function
∙Flash and Earth register recall
∙Access pause generation and termination
∙On-chip power-on reset
∙Supports function keys as follows:
–STORE: Program/Store
–MRC: Memory Recall
–FLASH: calibrated line-break pulse
–LNR: Last Number Redial
–PAUSE: insert access pause between stored digits
–TONE: change from pulse to DTMF dialling (mixed mode)
–VOL+/−: speaker/ringer volume control
–10 dedicated memory keys
∙Strap functions (diode options):
–MLA: Memory Location Access selection
–RDS: Enable/Disable ringer validation delay (PCD3332-2)
–DOO: enable/disable transmission or # (PCD3332-3/S)
–F/E: register recall Flash or Earth
–M/S: Mark-to-Space ratio selection (3 : 2 or 2 : 1)
–APT: Access Pause Timing selection
–TBT: Tone Burst Time selection
–FTS: Flash Time Selection
–P/T: Pulse or Tone (DTMF) mode selection
–RMS: Ringer Melody Selection (PCD3332-2 and PCD3332-S)
–RFS: Ringer input frequency range selection (19.5 to 57 Hz or 14.4 to 68 Hz) (PCD3332-3)
∙Ringer tone generator
∙Ringer-input frequency discriminator
∙Ringer melody selection via keypad
∙Volume control for loudspeaker phones (PCD3332-3)
∙On-hook dialling/hands-free mode control (PCD3332-3)
∙Pacifier tones.
2 GENERAL DESCRIPTION
The PCD3332-2, PCD3332-3 and PCD3332-S are mixed-mode multistandard repertory dialler/ringer ICs, fabricated in a low threshold voltage CMOS technology. Dial parameters of these ICs can be set by diode options to meet the specific requirements for various countries. The on-chip tone generators are used for DTMF dialling and ringer melody generation. A discriminator input enables the tone output only if a correct ringer frequency is applied. Repertory numbers of up to 32 digits can be stored, with maximum storage of 250 digits.
3 ORDERING INFORMATION
TYPE |
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PACKAGE |
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NUMBER |
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DESCRIPTION |
VERSION |
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PCD3332-2P |
DIP28 |
plastic dual in-line package; 28 leads (600 mil) |
SOT117-1 |
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PCD3332-2T |
SO28 |
plastic small outline package; 28 leads; body width 7.5 mm |
SOT136-1 |
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PCD3332-3P |
DIP28 |
plastic dual in-line package; 28 leads (600 mil) |
SOT117-1 |
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PCD3332-3T |
SO28 |
plastic small outline package; 28 leads; body width 7.5 mm |
SOT136-1 |
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PCD3332-SP |
DIP28 |
plastic dual in-line package; 28 leads (600 mil) |
SOT117-1 |
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PCD3332-ST |
SO28 |
plastic small outline package; 28 leads; body width 7.5 mm |
SOT136-1 |
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1997 Jan 13 |
3 |
Philips Semiconductors |
Product specification |
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Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
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4 PINNING
4.1PCD3332-2
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SYMBOL |
PIN |
TYPE |
DESCRIPTION |
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ROW2 |
1 |
I/O(1) |
row 2 keyboard output |
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ROW3 |
2 |
I/O(1) |
row 3 keyboard output |
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ROW4 |
3 |
I/O(1) |
row 4 keyboard output |
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ROW5 |
4 |
O(2) |
row 5 keyboard output |
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DIODE |
5 |
I/O(1) |
diode option |
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MUTE |
6 |
O(4) |
mute output |
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EARTH |
7 |
O(4) |
earth recall |
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CSI |
8 |
I |
cradle switch input |
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XTAL1 |
9 |
I |
oscillator input |
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XTAL2 |
10 |
O |
oscillator output |
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RESET |
11 |
I |
reset input |
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CE/FDI |
12 |
I |
chip enable/frequency discriminator |
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COL6 |
13 |
I/O(1) |
column 6 input |
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COL5 |
14 |
I/O(1) |
column 5 input |
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COL4 |
15 |
I/O(1) |
column 4 input |
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COL3 |
16 |
I/O(1) |
column 3 input |
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COL2 |
17 |
I/O(1) |
column 2 input |
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COL1 |
18 |
I/O(1) |
column 1 input |
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19 |
O(2) |
dial pulse/flash output |
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DP/FL |
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not used |
20 |
O(4) |
not used, leave pin unconnected |
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VOL2 |
21 |
O(3) |
volume 2 output |
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VSS |
22 |
P |
ground |
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TONE |
23 |
O |
tone generator output |
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VDD |
24 |
P |
positive supply voltage |
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VOL1 |
25 |
O(3) |
volume 1 output |
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DMO/KTE |
26 |
O(4) |
dial mode output |
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RTE |
27 |
O(4) |
key/ringer tone enable |
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ROW1 |
28 |
I/O(1) |
row 1 keyboard output |
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Notes on types and initial states of inputs and outputs
1.Standard input or output, set to HIGH state.
2.Open-drain output, set to HIGH state.
3.Open-drain output, reset to LOW state.
4.Push-pull output, reset to LOW state.
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ROW2 |
1 |
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28 |
ROW1 |
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ROW3 |
2 |
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27 |
RTE |
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ROW4 |
3 |
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26 |
DMO/KTE |
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ROW5 |
4 |
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25 |
VOL1 |
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DIODE |
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VDD |
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5 |
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24 |
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MUTE |
6 |
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23 |
TONE |
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EARTH |
7 |
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22 |
VSS |
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PCD3332-2 |
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CSI |
8 |
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21 |
VOL2 |
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XTAL1 |
9 |
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20 |
not used |
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XTAL2 |
10 |
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19 |
DP/FL |
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RESET |
11 |
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18 |
COL1 |
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CE/FDI |
12 |
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17 |
COL2 |
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COL6 |
13 |
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16 |
COL3 |
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COL5 |
14 |
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15 |
COL4 |
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MBE757 |
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Fig.1 Pin configuration.
1997 Jan 13 |
4 |
Philips Semiconductors |
Product specification |
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Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
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4.2PCD3332-3
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SYMBOL |
PIN |
TYPE |
DESCRIPTION |
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ROW2 |
1 |
I/O(1) |
row 2 keyboard output |
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ROW3 |
2 |
I/O(1) |
row 3 keyboard output |
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ROW4 |
3 |
I/O(1) |
row 4 keyboard output |
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ROW5 |
4 |
O(2) |
row 5 keyboard output |
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DIODE |
5 |
I/O(1) |
diode option |
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MUTE |
6 |
O(4) |
mute output |
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EARTH |
7 |
O(4) |
earth recall |
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CSI |
8 |
I |
cradle switch input |
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XTAL1 |
9 |
I |
oscillator input |
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XTAL2 |
10 |
O |
oscillator output |
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RESET |
11 |
I |
reset input |
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CE/FDI |
12 |
I |
chip enable/frequency discriminator |
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COL6 |
13 |
I/O(1) |
column 6 input |
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COL5 |
14 |
I/O(1) |
column 5 input |
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COL4 |
15 |
I/O(1) |
column 4 input |
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COL3 |
16 |
I/O(1) |
column 3 input |
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COL2 |
17 |
I/O(1) |
column 2 input |
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COL1 |
18 |
I/O(1) |
column 1 input |
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19 |
O(2) |
dial pulse/flash output |
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DP/FL |
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LFE |
20 |
O(4) |
low-frequency amplifier enable |
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VOL2 |
21 |
O(3) |
volume 2 output |
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VSS |
22 |
P |
ground |
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TONE |
23 |
O |
tone generator output |
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VDD |
24 |
P |
positive supply voltage |
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VOL1 |
25 |
O(3) |
volume 1 output |
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DMO/KTE |
26 |
O(4) |
dial mode output |
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HF/RTE |
27 |
O(4) |
hands-free/ringer tone enable |
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ROW1 |
28 |
I/O(1) |
row 1 keyboard output |
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Notes on types and initial states of inputs and outputs
1.Standard input or output, set to HIGH state.
2.Open-drain output, set to HIGH state.
3.Open-drain output, reset to LOW state.
4.Push-pull output, reset to LOW state.
age
ROW2 |
1 |
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28 |
ROW1 |
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ROW3 |
2 |
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27 |
HF/RTE |
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ROW4 |
3 |
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26 |
DMO/KTE |
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ROW5 |
4 |
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25 |
VOL1 |
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DIODE |
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VDD |
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5 |
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24 |
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MUTE |
6 |
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23 |
TONE |
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EARTH |
7 |
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22 |
VSS |
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PCD3332-3 |
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CSI |
8 |
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21 |
VOL2 |
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XTAL1 |
9 |
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20 |
LFE |
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XTAL2 |
10 |
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19 |
DP/FL |
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RESET |
11 |
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18 |
COL1 |
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CE/FDI |
12 |
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17 |
COL2 |
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COL6 |
13 |
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16 |
COL3 |
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COL5 |
14 |
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15 |
COL4 |
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MBE752 |
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Fig.2 Pin configuration.
1997 Jan 13 |
5 |
Philips Semiconductors |
Product specification |
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Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
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4.3PCD3332-S
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SYMBOL |
PIN |
TYPE |
DESCRIPTION |
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ROW2 |
1 |
I/O(1) |
row 2 keyboard output |
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ROW3 |
2 |
I/O(1) |
row 3 keyboard output |
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ROW4 |
3 |
I/O(1) |
row 4 keyboard output |
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ROW5 |
4 |
O(2) |
row 5 keyboard output |
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DIODE |
5 |
I/O(1) |
diode option |
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MUTE |
6 |
O(4) |
mute output |
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EARTH |
7 |
O(4) |
earth recall |
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CSI |
8 |
I |
cradle switch input |
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XTAL1 |
9 |
I |
oscillator input |
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XTAL2 |
10 |
O |
oscillator output |
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RESET |
11 |
I |
reset input |
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CE/FDI |
12 |
I |
chip enable/frequency discriminator |
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COL6 |
13 |
I/O(1) |
column 6 input |
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COL5 |
14 |
I/O(1) |
column 5 input |
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COL4 |
15 |
I/O(1) |
column 4 input |
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COL3 |
16 |
I/O(1) |
column 3 input |
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COL2 |
17 |
I/O(1) |
column 2 input |
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COL1 |
18 |
I/O(1) |
column 1 input |
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19 |
O(2) |
dial pulse/flash output |
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DP/FL |
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not used |
20 |
O(4) |
not used, leave pin unconnected |
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VOL2 |
21 |
O(3) |
volume 2 output |
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VSS |
22 |
P |
ground |
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TONE |
23 |
O |
tone generator output |
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VDD |
24 |
P |
positive supply voltage |
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VOL1 |
25 |
O(3) |
volume 1 output |
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DMO/KTE |
26 |
O(4) |
dial mode output |
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RTE |
27 |
O(4) |
key/ringer tone enable |
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ROW1 |
28 |
I/O(1) |
row 1 keyboard output |
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Notes on types and initial states of inputs and outputs
1.Standard input or output, set to HIGH state.
2.Open-drain output, set to HIGH state.
3.Open-drain output, reset to LOW state.
4.Push-pull output, reset to LOW state.
age
ROW2 |
1 |
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28 |
ROW1 |
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ROW3 |
2 |
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27 |
RTE |
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ROW4 |
3 |
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26 |
DMO/KTE |
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ROW5 |
4 |
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25 |
VOL1 |
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DIODE |
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VDD |
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5 |
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24 |
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MUTE |
6 |
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23 |
TONE |
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EARTH |
7 |
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22 |
VSS |
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PCD3332-S |
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CSI |
8 |
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21 |
VOL2 |
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XTAL1 |
9 |
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20 |
not used |
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XTAL2 |
10 |
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19 |
DP/FL |
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RESET |
11 |
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18 |
COL1 |
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CE/FDI |
12 |
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17 |
COL2 |
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COL6 |
13 |
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16 |
COL3 |
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COL5 |
14 |
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COL4 |
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MBE754 |
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Fig.3 Pin configuration.
1997 Jan 13 |
6 |
Philips Semiconductors |
Product specification |
|
|
Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
|
|
5 FUNCTIONAL DESCRIPTION
References to the ‘PCD3332’ or the ‘device’ apply to the PCD3332-2, the PCD3332-3 and the PCD3332-S.
5.1Pin description
5.1.1SUPPLY TERMINALS (VDD AND VSS)
To retain data in the RAM, the standby supply voltage of 1 V, must be maintained. To ensure that the contents of the RAM are secure in the event of a power failure, a capacitor may be connected across the supply terminals. The capacitor must have a suitable value to maintain the standby voltage for a certain period of time. The minimum operating voltage of these devices is 2.5 V. The internal power-on reset is enabled for a voltage below this minimum operating voltage.
5.1.4CRADLE SWITCH INPUT (CSI)
CSI is normally generated from the physical ‘off-hooking’ of the phone. CSI in combination with CE/FDI determines the operating mode of the PCD3332, as shown in Table 1.
Table 1 Different modes of the PCD3332
INPUT CSI |
INPUT CE/FDI |
PCD3332 STATUS |
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LOW |
LOW |
stop or power-down |
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mode |
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HIGH |
LOW |
idle mode |
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LOW |
HIGH |
ringer mode |
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HIGH |
HIGH |
conversation or |
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off-hook mode |
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5.1.5RESET INPUT (RESET)
5.1.2OSCILLATOR INPUT/OUTPUT (XTAL1 AND XTAL2)
The time base for the PCD3332 is a crystal-controlled on-chip oscillator, which incorporates a 3.58 MHz crystal or ceramic resonator connected between XTAL1 and XTAL2. It should be noted that when using a ceramic resonator, the minimum supply voltage increases.
The oscillator starts when VDD reaches its operating voltage level and CE = HIGH (min. 2.5 V).
5.1.3CHIP ENABLE AND FREQUENCY DISCRIMINATOR INPUT (CE/FDI)
For DC inputs this pin acts as the chip enable (CE) input, and is active HIGH. CE in combination with the Cradle Switch Input (CSI) determines the mode of the device. See Table 1.
RESET activates the on-chip reset circuit and is active HIGH. The reset circuit initializes all inputs and outputs. Two other events will cause the chip to initialize:
∙CE going HIGH
∙VDD falling below 2.5 V, then being restored (power-on reset).
For this reason, RESET may not be required, and can be connected to VSS. This should preferably be via a 100 kΩ resistor, to save leakage current.
Note that a suitable capacitor connected between VDD and VSS will inhibit the decrease of voltage at VDD after a power failure, and thus extend the time until the power-on reset is initiated.
5.1.6PULSE DIAL AND FLASH OUTPUT (DP/FL)
For AC inputs the pin acts as the (ringer) Frequency Discriminator Input (FDI).
To generate a correct ringer output tone, the input frequency must be between 19.5 Hz and 57 Hz; frequencies below 18 Hz and higher than 64 Hz are omitted.
The PCD3332-3 has a second (diode selectable) range of valid input frequencies of 14.5 Hz to 68 Hz; frequencies below 14 Hz and higher than 76 Hz are omitted.
Ringer response timing and detection is illustrated in Fig.15.
This pin is the output for:
∙The dial pulse sequence (DP)
∙The calibrated LOW pulse (FL) after the FLASH key is pressed.
The dialling sequence for pulse dialling is shown in Figs 11 and 12. DP/FL starts HIGH, pulses are LOW, and the inter-digit pauses are HIGH. Thus, DP/FL is HIGH during a line-make and LOW during a line-break.
If the Flash/Earth diode option is set to FLASH, then when FLASH is pressed a LOW pulse is output, with a calibrated duration also determined by diode option.
1997 Jan 13 |
7 |
Philips Semiconductors |
Product specification |
|
|
Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
|
|
5.1.7MUTE OUTPUT (MUTE)
During the dialling sequence this push-pull output is activated. In the pulse dialling mode, MUTE goes HIGH prior to the dialling action and goes LOW after the last tidp (interdigit pause), see Figs 11 and 12. In DTMF dialling, MUTE goes HIGH prior to the dialling action and goes LOW after an additional ‘holdover’ time, see
Figs 13 and 14.
This output is also activated if the device enters the programming mode, to avoid transmitting the keys entered.
5.1.8DTMF OUTPUT (TONE)
The timing sequence for DTMF dialling is illustrated in Figs 13 and 14. The tones generated by this TONE are filtered by an on-chip switched capacitor filter, and active
RC low-pass filter. Therefore, the total harmonic distortion fulfils the CEPT CS203 recommendations. An on-chip reference voltage provides output tone levels independent of supply voltages and temperatures. Spread among the individual parts is extremely low.
The DC level of the TONE output measures 0.5VDD and the impedance is 100 Ω (typ.). Table 2 shows the frequency tolerances.
The TONE output is also used to generate the ringer melody, key entry acceptance beep, error or warning beeps and confirmation beeps. These beeps are generated/set in programming mode as a response to the users action. The ringer is designed to generate 3-melodies that may be selected using the keyboard. Table 3 shows the implemented ringer melodies.
Table 2 DTMF frequency tolerances
ROW/COL |
STANDARD |
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OUTPUT |
DEVIATION |
DEVIATION |
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FREQUENCY (Hz) |
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FREQUENCY (Hz) |
(%) |
(Hz) |
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ROW 1 |
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697 |
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697.90 |
+0.13 |
+0.90 |
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ROW 2 |
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770 |
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770.46 |
+0.06 |
+0.46 |
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ROW 3 |
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852 |
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852.45 |
−0.18 |
−1.55 |
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ROW 4 |
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941 |
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943.23 |
+0.24 |
+2.23 |
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COL 1 |
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1209 |
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1206.45 |
−0.21 |
−2.55 |
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COL 2 |
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1336 |
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1341.66 |
+0.42 |
+5.66 |
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COL 3 |
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1477 |
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1482.21 |
+0.35 |
+5.21 |
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Table 3 |
Ringer melodies |
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KEY DEPRESSED |
TONE 1 (Hz) |
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TONE 2 (Hz) |
TONE 3 (Hz) |
TONE ON TIME (ms) |
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1 |
826 |
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925 |
1037 |
30 |
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2 |
1037 |
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1161 |
1297 |
30 |
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3 |
1297 |
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1455 |
1621 |
30 |
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Table 4 |
Beep frequencies |
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BEEP FUNCTION |
TONE 1 (Hz) |
TONE 2 (Hz) |
TONE 3 (Hz) |
TONE ON TIME (ms) |
TONE OFF TIME |
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(ms) |
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Key accept |
2358 |
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− |
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− |
40 |
− |
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Error |
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2358 |
2358 |
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2358 |
134 |
35 |
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Confirmation |
806 |
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899 |
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1010 |
134 |
67 |
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1997 Jan 13 |
8 |
Philips Semiconductors |
Product specification |
|
|
Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
|
|
5.1.9REGISTER RECALL (EARTH)
If the Flash/Earth diode option of the PCD3332 is set to the Earth, then dialling the EARTH either out of Repertory/LNR or by pressing the FLASH key will generate a HIGH pulse at the push-pull output EARTH for a calibrated time. Figures 12 and 14 illustrate the EARTH timing relationship with other signals. The calibrated EARTH time is followed by an interdigit time tidp. A second dialling of EARTH can only be performed after the interdigit time has elapsed.
If the Flash key was the first key depressed directly after going off-hook, followed by a second depressing of the Flash key while the EARTH is still in progress, then the second depression will be ignored.
5.1.10RINGER TONE ENABLE (RTE: PCD3332-2/S)
The PCD3332-2 and PCD3332-S generate tones for the ringer output stage and key tones when depressing a function key at the keypad. Output RTE will go HIGH and stay HIGH for the duration of the tone generated at output TONE.
5.1.11HANDS-FREE/RINGER TONE ENABLE (HF/RTE: PCD3332-3)
The PCD3332-3 generates tones for the ringer output stage and key tones when depressing a function key at the keypad. Output HF/RTE will go HIGH and stay HIGH for the duration of the tone generated at output TONE.
During the conversation mode, HF/RTE is used for enabling the hands-free mode. Depressing the HOOK key will change the operation mode as follows:
∙Change from on-hook (stop mode) to hands-free mode
∙Toggles the listening-in mode
∙Change from handset to hands-free.
5.1.12VOLUME CONTROL OUTPUTS (VOL1 AND VOL2)
5.1.12.1PCD3332-2
The PCD3332-2 has the facility to control the ringer output signal, as well as the loudspeaker volume, by depressing the keys /VOL− or #/ VOL+ during the ringer mode.
If the maximum volume level is reached, depressing #/VOL+ key will not change the volume setting. If the minimum volume level is reached, depressing /VOL− key will not change the volume setting. Selection between ringer volume or conversation mode volume, is performed in the hardware using the RTE output. In the ringer mode the output RTE is HIGH.
Table 5 shows the volume outputs setting, as well as the default setting in case of a power failure or if the power is supplied for the first time.
5.1.12.2PCD3332-3
The PCD3332-3 has the facility to control the ringer output signal and the loudspeaker signal during listening-in or hands-free operation. Depressing the keys VOL− or VOL+ during the ringer mode will change the ringer volume setting. Depressing the keys VOL− or VOL+ during the conversation mode will change the loudspeaker volume setting.
If the maximum volume level is reached, depressing the VOL+ key will not change the volume setting. If the minimum volume level is reached, depressing the VOL− key will not change the volume setting. Selection between ringer volume or conversation mode volume, is performed in the hardware using the HF/RTE output. In the ringer mode the output HF/RTE is HIGH.
Table 5 shows the volume outputs setting, as well as the default setting in case of a power failure or if the power is supplied for the first time.
5.1.12.3PCD3332-S
The PCD3332-S has the facility to control the ringer output signal by depressing the keys VOL− or VOL+ during the ringer mode.
If the maximum volume level is reached, depressing the VOL+ key will not change the volume setting. If the minimum volume level is reached, depressing the VOL− key will not change the volume setting. Selection between ringer volume or conversation mode volume, is performed in the hardware using the RTE output. In the ringer mode the output RTE is HIGH.
Table 5 shows the volume outputs setting, as well as the default setting in case of a power failure or if the power is supplied for the first time.
1997 Jan 13 |
9 |
Philips Semiconductors |
Product specification |
|
|
Multistandard pulse/tone repertory |
PCD3332-2; PCD3332-3; |
diallers/ringers |
PCD3332-S |
|
|
5.1.13RINGER VOLUME SETTINGS
handbook, halfpage VOL+/#
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DEFAULT |
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VOLUME |
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VOL+/# |
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VOL−/* |
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HIGH |
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VOLUME |
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VOL+/# |
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VOL−/* |
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LOW |
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VOLUME |
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VOL+/# |
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VOL−/* |
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LOWEST |
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VOLUME |
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VOL−/* |
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MGC616 |
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Fig.4 FSM for volume control (PCD3332-2).
handbook, halfpage |
VOL+ |
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DEFAULT |
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VOLUME |
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VOL+ |
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VOL− |
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HIGH |
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VOLUME |
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VOL+ |
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VOL− |
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LOW |
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VOLUME |
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VOL+ |
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VOL− |
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LOWEST |
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VOLUME |
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VOL− |
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MGC615 |
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Fig.5 FSM for volume control (PCD3332-3/S).
Table 5 State assignment
STATE |
VOL2 |
VOL1 |
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Default volume setting |
HIGH |
HIGH |
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High volume setting |
HIGH |
LOW |
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Low volume setting |
LOW |
HIGH |
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Lowest volume setting |
LOW |
LOW |
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5.1.14DIAL MODE OUTPUT /KEY-TONE ENABLE
(DMO/KTE)
In the PULSE dialling mode the DMO/KTE output is activated (HIGH), at dialling the Make/Brake pulse dial sequences. Figures 11 and 12 illustrate the signal timing relationship.
In the programming mode, the DMO/KTE output is activated at the same time the key beeps are generated at output TONE and may be used to enable the key tone to the earpiece amplifier.
5.1.15KEYBOARD INPUTS/OUTPUTS
A single contact keyboard with a maximum of 6 columns and 5 rows can be connected to the PCD3332-2.
The keyboard scanning is started if a key depression is detected. The rows are scanned while the columns are used as sense inputs.
To overcome key bouncing, a debounce on/off time of approximately 14 to 20 ms is implemented.
Only one single key depression is validated and accepted at any one time. Once a key is accepted the keyboard scanning is continued until no further keys are depressed. This means that if a key is accepted but still depressed while a second key is entered, the second key depression is ignored. Also, if two or more keys are depressed within the debounce time while no key is yet accepted, all keys are ignored.
Keyboard detection is also performed in the ringer mode to enable the ringer volume setting and ringer melody selection.
In the on-hook mode or power-down mode of the PCD3332-2 and PCD3332-S, the keyboard I/Os are set to HIGH except ROW 5 which is set to LOW.
1997 Jan 13 |
10 |
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