NXP Semiconductors UM11712, Руководство пользователя, Страница: 7 / 31

NXP Semiconductors
UM11712
PCAL6534EV-ARD evaluation board
aaa-044875
MAX V
CPLD
#3
2
16 BIT I/O PORT
PCAL6534
34 BIT I/O
EXPANDER
#16 #16
#1
6
#10
#8
SDA
SCL
INTEL
8 BIT I/O PORT
10 BIT I/O PORT
P0_0 to P0_7
P1_0 to P1_7
P2_0 to P2_7
P3_0 to P3_7
P4_0, P4_1
#6
#3
LDO 1 LDO 2
USER LEDs
USER SW
I2C
CONTROL BUS
NXP
U2
J6
J7
J8
U1
U4 U3
J1 J2
J3 J4
D13 - D16
D4 D5 D6 D7 D8 D9 D10 D11
SW1 SW2 SW3 SW4 SW5
ARDUINO INTERFACE
3.3V 1.8V
5V
Figure 2. PCAL6534EV-ARD block diagram
4.4 Schematic diagram
The schematic diagram of PCAL6534EV-ARD is available at URL: http://www.nxp.com/
PCAL6534EV-ARD .
4.5 Arduino port
J1, J2, J3, and J4 are the mated pin headers of Arduino Uno R3 connectors, having
the same electrical function and placed on the board, so that the daughterboard can
be directly inserted in the Arduino port. The daughterboard uses only five signal lines.
Table 1 shows the pin chart of connectors, and the used lines in the circuit (see also the
SPF-46656.pdf schematic file):
Ref Des # Arduino label PCAL6534EV-ARD function
1 NC Not used
2 IOREF Not used
3 RESET Not used
4 3.3V Not used
5 5V Power supply
6 GND Power supply return
7 GND Power supply return
J1 (Power)
8 Vin Not used
1 A0 Not used
J2 (analog, digital, I
2
C)
2 A1 Not used
Table 1. The pin chart of Arduino connectors and their usage
UM11712 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1.0 — 31 January 2022
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