P89LPC9321FN NXP Semiconductors, P89LPC9321FN Datasheet - Page 49

• Manufacturer Part Number: P89LPC9321FN
• Description: MCU 8-Bit 89LP 80C51 CISC 8KB Flash 2.5V/3.3V 28-Pin PDIP Tube
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89LPC9321_1
Product data sheet
7.32 User sector security bytes
7.33 PGA
There are eight User Sector Security Bytes on the P89LPC9321. Each byte corresponds
to one sector. Please see the P89LPC9321 User manual for additional details.
Additional PGA module is integrated. The gain of PGA can be programmable to 2, 4, 8
and 16. Please refer to
Register PGACON1 and PGACON1B are used to for PGA1 configuration. Register
PGA1TRIM2X4X and PGA1TRIM8X16X provide trim value of PGA1 gain level. As
power-on, default trim value for each gain setting is loaded into the PGA1 trim registers.
For accurate measurements, offset calibration is required.
Please see the P89LPC9321 User manual for detail configuration, calibration, and usage
information.
In Power-down mode or Total Power-down mode, the PGA1 does not function. If the
PGAs, is enabled, it will consume power. Power can be reduced by disabling the PGA1.
Rev. 01 — 9 December 2008
Table 10 “Static characteristics”
8-bit microcontroller with accelerated two-clock 80C51 core
for detailed specifications.
P89LPC9321
© NXP B.V. 2008. All rights reserved.
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