參數(shù)資料
型號(hào)： PCD3330-1P
廠商： NXP SEMICONDUCTORS
元件分類： 無(wú)繩電話/電話
英文描述： Multistandard repertory dialler/ringer with EEPROM
中文描述： TELEPHONE MULTIFUNCTION CKT, PDIP28
封裝： 0.600 INCH, PLASTIC, SOT-117, DIP-28
文件頁(yè)數(shù)： 14/32頁(yè)
文件大?。?/td> 152K
代理商： PCD3330-1P
1997 Jan 15
14
Philips Semiconductors
Product specification
Multistandard repertory dialler/ringer with
EEPROM
PCD3330-1
5.3.2.1
Factory EEPROM programming procedure
The COL1 to COL4 of the PCD3330-1 can be used in the
factory to read or write the contents of the internal
EEPROM. COL1 (pin 1) is the SCL and COL2 (pin 2) is the
SDA of the I
2
C-bus interface, while COL3 (pin 3) and
COL4 (pin 4) determine the mode selected. In Fig.6 the
principle for this programming procedure is given.
The status of pins COL3 and COL4 is read directly after a
power-on-reset and the status can be changed with
switches S1 and S2 (open: pin is HIGH; closed: pin is
LOW).
Table 4
Function of switches S1 and S2
If during the programming mode S1 is opened the
programming stops and the PCD3330-1 goes to the
telephone mode. If now S1 is closed again the set stays in
telephone mode.
In the write mode the PCD3330-1 is able to read the
contents of an external RAM (128 bytes) or the PCF8581
(EEPROM) via COL1 and COL2.
In the read mode the PCD3330-1 sends the contents of its
internal EEPROM via COL1 and COL2 to the external
device.
All 128 bytes of EEPROM are read or written in each read
or write operation.
S1
S2
MODE
open
closed open
closed closed test mode: PCD3330-1 EEPROM read
open
normal mode
test mode: PCD3330-1 EEPROM write
Fig.6
Circuit diagram for the EEPROM
programming procedure.
handbook, halfpage
MGG576
SCL
SDA
S1
S2
COL1
COL2
COL3
COL4
1
2
6
5
3
4
PCD3330-1
PCA8581
5.3.2.2
EEPROM programming procedures via
keyboard
This procedure is only active if EEPROM
Program
Blocking
byte (number 127 of the internal EEPROM) is
set to ‘FF’ hex. If this byte is ‘00’ hex it is not possible to do
the program procedures described in this chapter.
Byte 127 of the EEPROM can only be set by the factory
EEPROM programming procedure.
In the field all telephone options can be changed easily by
a special program procedure:
Depress the STO-key (this selects the program mode)
Depress the LNR-key (switches the program module to
storing EEPROM options
Depress the first key of a three digit access code (the 1)
Depress the second key of a three digit access code
(the 6)
Depress the third key of a three digit access code (the 0)
Depress the LNR-key again (end the access code)
Press the byte number (last digit of the EEPROM byte
number given in Table 2)
Press the number of the bit to change (see Table 2)
Press 0 or 1 (this changes the EEPROM bit contents)
Depress the LNR-key, which stores the correction into
EEPROM, now select a new byte or go to end
End the routine by pressing the STO-key again.
If during this procedure a mistake is made correction is
possible after proper access code by pressing the
LNR-key and during access code only by STO-key.
In all cases the routine can be ended by pressing the
STO-key.
Example:
Change the mark-to-space ratio from 3 : 2 to 2 : 1. Then
bit 2 of EEPROM byte-120 has to be changed from 0 to 1.
The necessary action is as follows:
Depress the STO-key
Depress the LNR-key
Depress the 1-key (first digit access code)
Depress the 6-key (second digit access code
Depress the 0-key (third digit access code)
Depress the LNR-key again (end the access code)
Press the 0-key (last digit of EEPROM byte-120 is the 0)
Press the 2-key (bit 2 has to be changed)
Press the 1 (changes the mark-to-space ratio to 2 : 1)
Press the LNR or STO-key.
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PDF描述
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PCD3330-1T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard repertory dialler/ringer with EEPROM
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