NXP Semiconductors
UM11227
NTM88 family of tire pressure monitor sensors
UM11227 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 6 — 24 April 2020
5 / 205
Digital values between D
INLO
and D
INHI
will normally produce an output between 1 to
510 (for a 9-bit result). In some isolated cases due to compensation calculations and
rounding, the result may be less than 1 or greater than 510, in which case the underflow
and overflow rule mentioned above is used.
4.5 Memory resource usage
At address $FC00, 1024 bytes are protected from erasure, containing the sensitivity and
offset coefficients for the transducers and clocks.
The firmware uses no specific bytes of the RAM but will cause additional stacking of
temporary values.
The firmware uses 2 bytes ($008E and $008F) of the Parameter Registers for global
flags for all routines.
5 Marking
5.1 Exterior markings
The marking on the NTM88 family contain three lines of text, described as follows:
1. Line 1 identifies the location of pin 1 and present the NXP logo
2. Line 2 identifies part marking information, see Table 3 for details on the NTM88
markings.
3. Line 3 is the trace code. See Table 4 for trace code definitions.
Table 3. Example Exterior Marking
Marking
Part Number Company
[1]
Family
[2]
Pressure
[3]
Accelerometer
[4]
Mechanical
[5]
NTM88H05xT1 N 8 H a a x
[1] Company column: N = qualified.
[2] Family column: Always "8".
[3] Pressure column: Pressure range, with "H" = 90 kPa to 930 kPa.
[4] Accelerometer columns: Where "a a" are two letters representing the accelerometer configuration.
[5] Mechanical column: Where "x" is a letter representing the mechanical configuration.
Table 4. Trace code definitions
Trace code Definition
A Assembly site
[1]
L Wafer lot
YW Year and work week
Z Assembly lot split
[2]
[1] "X" for site #1; additional letters for other assembly sites as needed.
[2] “Z” can be up to two characters "ZZ" when the number of subassembly lots > 26
To Next Page
Loading...
Need help?
General