PCA2002U/10AB/1,00 NXP Semiconductors, PCA2002U/10AB/1,00 Datasheet - Page 9

• Manufacturer Part Number: PCA2002U/10AB/1,00
• Manufacturer: NXP Semiconductors

Specifications of PCA2002U/10AB/1,00

• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
PCA2002_6
Product data sheet
7.8 Checking the memory content
The stored data of the OTP array can be checked bit wise by measuring the supply
current (see
addressed by the shift register.
To read a word, the word is first selected (t
the shift register (t
(t
If the addressed OTP cell contains a logic 1, a 30 kΩ resistor is connected between V
and V
Figure 6
supply current variation for word B = 110101 (sequence: first MSB and last LSB).
d
Fig 6.
= t
V
2
(1)
SS
P(prog)(start)
), so that it points with each clock pulse to the next bit.
V
; this increases the supply current accordingly.
V
shows the supply voltage modulation for reading word B, with the corresponding
DD(nom)
P(mod)
V
Supply voltage modulation for reading word B
ΔI
DD(nom)
V
V
DD
I
DD
DD
Figure
SS
32 kHz watch circuit with programmable output period and pulse width
=
All information provided in this document is subject to legal disclaimers.
: nominal supply voltage.
---------------- -
30 kΩ
d
V
6). The array word is selected by the instruction state and the bit is
= t
DD
3
). This logic 1 is then shifted through the entire shift register
t
Rev. 06 — 6 May 2010
p(start)
t
0
t
1
t
1
t
1
(1)
d
t
3
= t
1
) and a logic 1 is written into the first cell of
t
2
t
2
t
2
V
P(prog)(stop)
t
2
t
2
PCA2002
© NXP B.V. 2010. All rights reserved.
t
mgw357
p(stop)
9 of 26
DD