NXP Semiconductors LPCXpresso804, Руководство пользователя

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UM11083 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2018. All rights reserved.
User Manual Rev. 1.1 — 24 September 2018 11 of 16
NXP Semiconductors
LPCXpresso804
User Manual
7.4 Temperature sensor (LM75, circuit ref U7)
An NXP temperature sensor is included on the LPCXpresso804. This device interfaces to
the I
2
C peripheral of the LPC804, with an address of 0x1001100. Jumpers (JP4 and JP23)
are provided in-line with the SCL (PIO0_14) and SDA (PIO0_7) respectively so that this
device may be disconnected if not required.
7.5 SPI flash (Winbond W25X10CLSNIG, circuit ref U4)
A 1Mb SPI flash from Winbond is included on the LPCXpresso804. This device interfaces
to the SPI peripheral of the LPC804. A jumper (JP3) is provided to this device can be
disconnected (by disabling the SPI chip select PIO_16).
8. PLU Shield
The OM40001 package includes a shield board for use with the LPCXpresso804 board
when prototyping programmable logic unit (PLU) designs. The PLU shield provides the
following features to assist with this type of development:
•
5 slide switches to enable 5 possible PLU inputs to be connected to VDD (marked as
VCC on the Shield) or GND through a resistor (to set those inputs to a logic 1 or zero)
•
8 LEDs with jumpers to connect/disconnect possible PLU outputs for visual status
indication
•
Push button option for momentary / edge signal inputs
•
Low frequency oscillator with 1024Hz and 8Hz outputs
The PLU shield also includes a test circuit that can be used to implement a simple
continuity tester, for experimentation with the LPC804 ADC and DAC (requires some
shield board modification.)
Several signals from the LPC804 used on the PLU Shield are shared with other functions
on the main LPCXpresso804 board. Please review jumper settings on the
LPCXpresso804 board carefully before installing the PLU Shield.
The PLU can be programmed using a PLU Configuration tool, available to download for
free at https://www.nxp.com/demoboard/OM40001 under the Software and Tools tab.
8.1 PLU input options
On/off switches S1 through S5 connect possible PLU inputs to VDD or GND via a resistor,
enabling those inputs to be driven to a known, fixed state. PIO0_8 is connected to a push
button (S6) and a 100kohm pull up to VDD; PIO0_8 will be grounded when the button is
pressed.
Table 7 below shows these connections.
Table 6. User LED connections
LED LPC804 pin
Blue (D4) PIO0_11
Red (D3) PIO0_13
Green (D2) PIO0_12