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參數(shù)資料
| 型號： | PCD3310 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Pulse and DTMF diallers with redial |
| 中文描述： | 脈沖和DTMF撥號器與重撥 |
| 文件頁數(shù)： | 8/28頁 |
| 文件大?。?/td> | 145K |
| 代理商： | PCD3310 |
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1996 Nov 21
8
Philips Semiconductors
Product specification
Pulse and DTMF diallers with redial
PCD3310; PCD3310A
If the CE input is taken to a LOW level for longer than time
period t
rd
(see Figs 11 and 12 and Chapter 12) an internal
reset pulse will be generated at the end of the t
rd
period.
The system changes to the static standby state. Short CE
pulses of < t
rd
will not affect the operation of the device and
reset pulses are not produced.
7.4
Mode selection (PD/DTMF)
7.4.1
P
ULSE MODE
If PD/DTMF = V
SS
the pulse mode is selected. Entries of
non-numeric keys are neglected, they are neither stored in
the redial register nor transmitted.
7.4.2
DTMF
MODE
If PD/DTMF = V
DD
the dual tone multi-frequency dialling
mode is selected. Each non-function key activated
corresponds to a combination of two tones, one of four
LOW and one of four HIGH frequencies, corresponding to
the key’s row and column in the keyboard matrix.
See Fig.4 and Table 3. The frequencies are transmitted
with a constant amplitude, regardless of power supply
variations. Harmonic content is filtered out thus meeting
the CEPT recommendations.
The transmission time is calibrated for redial. In manual
operation the duration of bursts and pauses is the actual
key depression time, but not less than the minimum
transmission time (t
t
) or minimum pause time (t
p
).
7.4.3
M
IXED MODE
When the PD/DTMF pin is open-circuit the mixed mode is
selected. After activation of CE or FL (Flash) the device
starts as a pulse dialler and remains in this state until a
non-numeric dial key (A, B, C, D,
, #) or the function key >
is activated. Pressing a non-numeric dial key causes the
corresponding DTMF tones to be output, and any
subsequent dialling to be in DTMF mode. Pressing >
causes no output tones, but any subsequent dialling is in
DTMF mode. The > key should be used if the first DTMF
output required is numeric. The device remains in DTMF
dial mode until FL is activated or after a static standby
condition when CE is re-activated.
A connection between the PD/DTMF pin and V
DD
also
initiates DTMF dialling. Chip enable, FL or a connection of
PD/DTMF pin to V
SS
sets the device back to pulse dialling.
7.5
Keyboard inputs/outputs
The sense column inputs COL 1 to COL 4 and the
scanning row outputs ROW 1 to ROW 5 of the device are
connected to the keyboard as shown in Fig.4. All keyboard
entries are debounced on both the leading and trailing
edges for approximately time period t
e
as shown in
Figs 11, 12, 13 and 14. Each entry is tested for validity.
When a key is depressed, keyboard scanning starts and
only returns to the sense mode after release of that key.
ROW 5 of the keyboard contains the following function
keys:
P = memory clear and programming (notepad)
FL = flash or register recall
R = redial
> = change of dial mode from pulse to DTMF in mixed
dialling mode.
In the pulse dialling mode the valid keys are the
10 numeric dial keys (0 to 9). The non-numeric dial keys
(A, B, C, D,
, #) have no effect on the dialling or the redial
storage. Valid function keys are P, R and FL.
In the DTMF mode all dial keys are valid. They are
transmitted as a dual tone combination and at the same
time stored in the redial register. Valid function keys are P,
FL and R.
In the mixed mode all key entries are valid and executed
accordingly.
Fig.4 Keyboard organization.
handbook, halfpage
MGE491
1
2
3
4
5
6
7
8
9
0
#
P
FL
R
A
B
C
D
>
ROWS
COLUMNS
KEYBOARD
5
4
3
2
1
1
2
3
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCD3310A | Pulse and DTMF diallers with redial |
| PCD3310AP | Pulse and DTMF diallers with redial |
| PCD3310AT | Pulse and DTMF diallers with redial |
| PCD3310P | Pulse and DTMF diallers with redial |
| PCD3310T | Pulse and DTMF diallers with redial |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCD3310A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pulse and DTMF diallers with redial |
| PCD3310AP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pulse and DTMF diallers with redial |
| PCD3310APN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| PCD3310AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pulse and DTMF diallers with redial |
| PCD3310ATD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
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