English
Language : 

PE3341 Datasheet, PDF (10/17 Pages) Peregrine Semiconductor Corp. – 2700 MHz Integer-N PLL with Field-Programmable EEPROM Features
◁
PE3341
Product Specification
EEPROM Programming
Frequency control data that is present in the EE
Register can be written to the non-volatile
EEPROM. All 20 bits are written simultaneously
in a parallel operation. The EEPROM is
guaranteed for at least 100 erase/write cycles.
Erase Cycle
The EEPROM should be taken through an erase
cycle before writing data, since the write operation
performs a logical AND of the EEPROM’s current
contents with the data in the EE Register. Erasing
the EEPROM is accomplished by holding the
S_WR, EESel, and EELoad inputs HIGH, then
applying one ERASE programming voltage pulse
to the VPP input (see Table 13). The voltage
source for this operation must be capable of
supplying the EEPROM erase cycle current
(IPP_ERASE, Table 5). The timing diagram is
shown in Figure 5.
Table 13. EEPROM Programming
S_WR
1
1
EESel
1
0
EELoad
1
1
VPP
25ms @ −8.5V
25ms @ +12.5V
Function
Erase cycle
Write cycle
Write Cycle
Using the Serial Data Port, the EE Register is first
loaded with the desired data. The EEPROM is
then programmed with this data by taking the
S_WR input HIGH and EESel input LOW, then
applying one WRITE programming voltage pulse
to the VPP input. The voltage source for this
operation must be capable of supplying the
EEPROM write cycle current (IPP_WRITE, Table
5). The timing diagram of this operation is shown
in Figure 6. Programming is completed by taking
the EELoad input LOW.
Note that it is possible to erroneously overwrite
the EE Register with the EEPROM contents
before the write cycle begins by unneeded
manipulation of the EELoad bit (see Table 10).
Figure 5. EEPROM Erase Timing Diagram
EELoad
S_WR
EESel
tEESU
tVPP
0V
VPP_ERASE
-
8 5V
tEEPW
Figure 6. EEPROM Write Timing Diagram
EESel 0V
EELoad 3V
tVPP
tEESU
S_WR
12.5V
VPP_WRITE
0V
tEESU
tVPP
tEEPW
tVPP
tEESU
©2005 Peregrine Semiconductor Corp. All rights reserved.
Page 10 of 17
Document No. 70-0053-04 │ UltraCMOS™ RFIC Solutions
 ▷