NXP Semiconductors PCA9957 User manual

UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
Rev. 1.0 — 27 April 2020 User manual
Document information
Information Content
Keywords SPI-bus, PCA9957, RGB and White LEDs, 24-channel x 8-bit PWMs
Abstract The OMPCA9957LEDEV eval board allows test and design for the PCA9957,
which is a 24-channel SPI 4-wire bus 32 mA/5.5V constant current LED
driver. This eval board, along with the OM13089 MCU board, provides an
easy to use evaluation platform.

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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Revision history
Revision history
Rev Date Description
v.1.0 20200427 Initial version

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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1 Introduction
The PCA9957 evaluation board features LEDs for color mixing, blinking and dimming
demonstrations. A graphical interface allows the user to easily explore the different
functions of the driver. The board can be connected in series with other SPI-bus demo-
boards to create an evaluation system.
The IC communicates to the host via the industry standard SPI-bus port. The evaluation
software runs under Microsoft Windows 7, 8, and 10 PC platform.

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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2 Features
•A complete evaluation platform for the PCA9957 24-channel SPI-bus 35 mA/5.5V
constant current LED driver
•Easy to use GUI based software demonstrates the capabilities of the PCA9957.
•On-board Infrared, blue and RGB LEDs for variable experiments
•Convenient test points for easy scope measurements and signal access
•USB interface to the host PC
•Power supply from USB port (x2) or external power supply can be used to power
PCA9957 evaluation board

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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3 Getting started
3.1 Assumptions
Familiarity with the SPI-bus is helpful but not required.
3.2 Static handling requirements
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Therefore care
should be taken during transport and handling. You must use a ground strap
or touch the PC case or other grounded source before unpacking or handling
the hardware.
3.3 Minimum system requirements
•PC Pentium processor (or equivalent)
•One USB port (either 3.0 or 2.0 or 1.1 compatible)
•Windows 7, 8, or 10
•OM13089 MCU board (from www.nxp.com)
3.4 Power requirements
The OM13089 MCU board obtains power from the PC USB port, two USB parts can
be connected to the OM13089 MCU board simultaneously. Please use external power
supply option if exceeding the USB port current capabilities.

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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4 Hardware installation
4.1 OMPCA9957LEDEV EV board and OM13089 MCU board connection
OMPCA9957LEDEV evaluation board is connected to the OM13089 MCU board using
two connectors (J1 & J2 on OMPCA9957LEDEV board and J1 & J8 on OM13089 board).
The OM13089 MCU board communicates with PCA9957 demo GUI through PC USB
port and uses SPI bus to communicate to PCA9957.
Figure 1. OMPCA9957LEDEV evaluation board
Figure 2. OM13089 MCU board

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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•Use J5 (USB Micro-B connector) on OM13089 for power supply and GUI communication port.
•Use J7 (USB Micro-B connector) on OM13089 for additional power supply
Figure 3. OMPCA9957LEDEV evaluation board connecting to the OM13089 MCU board

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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5 Hardware description
•J1 and J2 are connected to the PM13089 MCU board.
•J123 selects PCA9957 VDD power supply.
•J120 selects PCA9957 VDDIO power supply.
•J113 selects LED power supply.
Table 1. OMPCA9957LEDEV EV board main components
Device Description Location
PCA9957 24-channel SPI-bus 32mA/5.5V constant current LED driver U2
LP38502SD-ADJ Adjustable output voltage LDO U3
Green LED Green LED for power supply indicator D1
APT1608QBC/D Blue LED D2, D3, D4
SCM-013RT Infrared LED D8, D9, D10
LRTB GVSG RGB LED D5, D6, D7, D11,
D12, D13
Table 2. Jumper settings for power supply
Jumper Default setting Comment
J123 1-2 1-2: Use +3V3 power supply for VDD 3-4: Use +5V power supply for
VDD Open: Use external power supply from J124
J124 N/A External power supply for VDD
J125 1-2 1-2: LED output enabled
Open: LED disabled
J129 Open 1-2: LED output disabled
Open: LED output enabled
J120 1-2 1-2: Use external power supply from J121 3-4: Use VDD_IN for VDDIO
power supply
J121 N/A External power supply for VDDIO
J118 1-2
1-2 : Not measuring VDD current Open: Use current meter to measure
VDD current
J122 1-2 1-2 : Not measuring VDDIO current Open: Use current meter to
measure VDDIO current
J137 1-2 1-2 : Use external POR circuit Open: Use internal POR circuit
J113 1-2 1-2: LED power supply from +5V_MCU 4-2: LED power supply from
VOUT_ADJ 3-2: LED power supply from +3V3_MCU
J63 3-4 REXT = 2 kohm, Iref = 125 uA
Output current = Iref * IREF_GRPx[7:0].
Table 3. Jumper settings Host interface
Jumper Default setting Comment
J1 N/A Power supply from OM13089 MCU board

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
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Jumper Default setting Comment
J2 N/A SPI bus interface to the OM13089 MCU board
J3, J4 N/A For OMPCA9957LEDEV SPI daisy chain test
J5 1-2 MISO
J6 1-2 MOSI
J7 N/A SPI bus test points
J8,J9,J10,J11 1-2 SPI bus
J52 N/A SPI bus test points
Table 4. Jumper settings for LEDs
Jumper Default setting Comment
J64 1-2 D2 - Blue LED 1-2: Not measuring D2 current Open: Use current meter
to measure D2 current
J116 Open D2 - Blue LED 1-2: Bypass D2 LED Open: Use D2 LED
J82 1-2 D3 - Blue LED 1-2: Not measuring D3 current Open: Use current meter
to measure D3 current
J81 Open D3 - Blue LED 1-2: Bypass D3 LED Open: Use D3 LED
J98 1-2 D4 - Blue LED 1-2: Not measuring D4 current Open: Use current meter
to measure D4 current
J97 Open D4 - Blue LED 1-2: Bypass D4 LED Open: Use D4 LED
J66, J69, J72 1-2 D5 - RGB LED 1-2: Not measuring D5 current Open: Use current meter
to measure D5 current
J67, J70, J71 Open D5 - RGB LED 1-2: Bypass D5 LED Open: Use D5 LED
J100, J101, J104 1-2 D6 - RGB LED 1-2: Not measuring D6 current Open: Use current meter
to measure D6 current
J99, J102, J103 Open D6 - RGB LED 1-2: Bypass D6 LED Open: Use D6 LED
J83, J85, J88 1-2 D7 - RGB LED 1-2: Not measuring D7 current Open: Use current meter
to measure D7 current
J84, J86, J87 Open D7 - RGB LED 1-2: Bypass D7 LED Open: Use D7 LED
J106 1-2 D8 - Infrared LED 1-2: Not measuring D8 current Open: Use current
meter to measure D8 current
J105 Open D8 - Infrared LED 1-2: Bypass D8 LED Open: Use D8 LED
J74 1-2 D9 - Infrared LED 1-2: Not measuring D9 current Open: Use current
meter to measure D9 current
J73 Open D9 - Infrared LED 1-2: Bypass D9 LED Open: Use D9 LED
J90 1-2 D10 - Infrared LED 1-2: Not measuring D10 current Open: Use current
meter to measure D10 current
J89 Open D10 - Infrared LED 1-2: Bypass D10 LED Open: Use D10 LED
J107, J110, J112 1-2 D11 - RGB LED 1-2: Not measuring D11 current Open: Use current
meter to measure D11 current
J108, J109, J111 Open D11 - RGB LED 1-2: Bypass D11 LED Open: Use D11 LED

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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Jumper Default setting Comment
J75, J77, J80 1-2 D12 - RGB LED 1-2: Not measuring D12 current Open: Use current
meter to measure D12 current
J76, J78, J79 Open D12 - RGB LED 1-2: Bypass D12 LED Open: Use D12 LED
J91, J93, J96 1-2 D13 - RGB LED 1-2: Not measuring D13 current Open: Use current
meter to measure D13 current
J92, J94, J95 Open D13 - RGB LED 1-2: Bypass D13 LED Open: Use D13 LED
Table 5. Jumper settings for SMB connectors
Jumper Default setting Comment
J12 N/A VDD SMB connector
J13 N/A /RESET pin SMB connector
J14 N/A VDDIO SMB connector
J15 N/A SDO pin SMB connector
J16 N/A SCLK pin SMB connector
J17 N/A SDI pin SMB connector
J18 N/A /CS pin SMB connector
J19 N/A /OE pin SMB connector
J20 N/A NCTest_VSS_OSCIN SMB connector
J21 N/A NCTest_OSCOUT SMB connector
J22 N/A REXT pin SMB connector
J23 - J30 N/A LED 0 - 7 pin SMB connector
J31, J40, J49-J51 N/A GND SMB connector
J32 - J39 N/A LED 8 - 15 pin SMB connector
J41 - J47, J164 N/A LED 16 - 23 pin SMB connector
Table 6. Jumper settings for banana connectors
Jumper Default setting Comment
J53 N/A VDD banana connector
J54 N/A VDDIO banana connector
J55 N/A /OE pin banana connector
J56 N/A /RESET pin banana connector
J57 - J60 N/A GND banana connector
J61 N/A 3V3_MCU banana connector
J62 N/A 3V_MCU banana connector
J165 N/A 1V8 banana connector

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
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Figure 4. Jumpers and test points location

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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6 Schematic
5
5
4
4
3
3
2
2
1
1
D
D
C C
B B
A A
VDDIO Ext Power Supply (1.65V - 5.5V)
VDDIO Power Supply From VDD_IN or EXT power
open to measure
the U1 VDD current
open to measure
the U1 VDDIO current
VDD Ext Power Supply (2.7V - 5.5V)
VDD Power Supply From MCU board (3V3 or 5V)
Output current = Iref * IREF_GRPx[7:0].
where Iref is reference current.
Iref = 125 uA if REXT = 2 kohm.
Ext /OE input
1-2: LED output control
Open -> Output disabled
Short -> Output enabled
+3V3_MCU
+5V_MCU
VDD
VDDIO
+1V8
LED[0..23] [3,4]
MCU_SSN[5]
MCU_MOSI_SW[5]
MCU_SCK[5]
MCU_MISO_SW[5]
SDO[4]
SCLK[4]
SDI[4]
/CS[4]
/OE[4]
REXT[4]
/RESET [4]
NCTest_OSCOUT[2,4]
NCTest[4]
NCTest_VSS_OSCIN[2,4]
NCTest_VSS_OSCIN [2,4]
NCTest_OSCOUT [2,4]
Drawing Title:
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ICAP Classification: CP: IUO: PUBI:
SCH-39109 PDF: SPF-39109 A1
OMPCA9957LEDEV
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PCA9957 & PCA9959 & SKT
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OMPCA9957LEDEV
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PCA9957 & PCA9959 & SKT
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Friday, February 28, 2020
PCA9957 & PCA9959 & SKT
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X
TP6
J132
JUMPER DEFAULT = OPEN
1
2
TP10
J131
JUMPER DEFAULT = OPEN
1 2
R35 10K
J10
HDR 1X2 TH
JUMPER DEFAULT = 1-2
1 2
J118
JUMPER DEFAULT = 1-2
1 2
TP19
TP1
J136
JUMPER DEFAULT = OPEN
1
2
A B
R40 0
R36 10K
R38 10K
J8
HDR 1X2 TH
JUMPER DEFAULT = 1-2
1 2
J125
JUMPER DEFAULT = 1-2
1 2
J133
JUMPER DEFAULT = OPEN
1 2
J124
HDR 1X2 TH
SILK = VDD EXT PWR
1
2
C34
1pF
DNP
TP4
+
C4
4.7UF
TP11
TP12
J146
JUMPER DEFAULT = 1-2
1
2
R2 10K
TP7
J129
JUMPER DEFAULT = OPEN
1
2
J121
HDR 1X2 TH
SILK = VDDIO EXT PWR
1
2
J11
HDR 1X2 TH
JUMPER DEFAULT = 1-2
1 2
TP3
J123
HDR TH 1X3
JUMPER DEFAULT = 1-2
1
2
3
J63
HDR 2X3
JUMPER DEFAULT = 3-4
1
2
3
4
6
5
+
C6
4.7UF
J135
JUMPER DEFAULT = OPEN
1 2
J9
HDR 1X2 TH
JUMPER DEFAULT = 1-2
1 2
U1
SKT QFN40 + PCA9957
DNP
CS
7
LED19
34
NC1
10
NC2
11
NC3
12
NC4
22
OE
8
RESET
2
REXT
39
SCLK
5
SDI
6
SDO
4
VSS1
9
VSS2
21
VSS3
40
VDD
1
VDDIO
3
LED10
25
LED11
26
LED12
27
LED13
28
LED14
29
LED15
30
LED16
31
LED17
32
LED18
33
LED20
35
LED21
36
LED22
37
LED23
38
LED0
13
LED1
14
LED2
15
LED3
16
LED4
17
LED5
18
LED6
19
LED7
20
LED8
23
LED9
24
U2
PCA9957
CS
7
LED19
34
NC1
10
NC2
11
NC3
12
NC4
22
OE
8
RESET
2
REXT
39
SCLK
5
SDI
6
SDO
4
VSS1
9
VSS2
21
VSS3
40
EXPAD
41
VDD
1
VDDIO
3
LED10
25
LED11
26
LED12
27
LED13
28
LED14
29
LED15
30
LED16
31
LED17
32
LED18
33
LED20
35
LED21
36
LED22
37
LED23
38
LED0
13
LED1
14
LED2
15
LED3
16
LED4
17
LED5
18
LED6
19
LED7
20
LED8
23
LED9
24
TP9
D1
LED GREEN
A
C
VARISTOR1
AVR-M1608C080MTAAB
1
2
R5 1.69K
0.1%
C3
0.1UF
TP8
TP2
J52
CON_1X5
SILK = PCA995x_SPI
1
2
3
4
5
R37 10K
A B
R39 0
TP13
J134
JUMPER DEFAULT = OPEN
1
2
C5
0.1UF
J145
JUMPER DEFAULT = OPEN
1 2
J122
JUMPER DEFAULT = 1-2
12
R41 0
TP14
R3
1K
TP20
R7 2K
0.1%
C35
1pF
DNP
J120
HDR TH 1X3
JUMPER DEFAULT = 2-3
1
2
3
SW1
FSMSM
SILK = RESET
1
2
R32 1K
0.1%
J137
JUMPER DEFAULT = 1-2
12
R1
10K
L1
100 OHM
X1
20MHz
1 3
2
/RESET
SDI
/CS
SDO
/OE
LED0
LED2
LED4
LED6
LED8
LED10
LED1
LED3
LED5
LED7
LED9
LED11
LED12
LED14
LED16
LED18
LED20
LED22
LED13
LED15
LED17
LED19
LED21
LED23
OSCOUT
VDD VDDIO
X_OSCIN
VDDIO_EXT
VDD_IN
VDDIO_IN
VDD_IN
VDD
VDDIN_EXT
VDDIO
VDDIO_IN
+1V8
+1V8
VDDIO_IN
VDD_IN
NCTest
VDDIO_IN
NCTest
LED[0..23]
LED0
LED2
LED4
LED6
LED8
LED10
LED1
LED3
LED5
LED7
LED9
LED11
LED12
LED14
LED16
LED18
LED20
LED22
LED13
LED15
LED17
LED19
LED21
LED23
VDD VDDIO
/OE
/RESET
SCLK
SDI
SCLK
/CS
SDO
REXT
SCLK
SDO
/CS
SDI
MCU_MOSI_SW
SDI
MCU_MISO_SW
SDO
MCU_SSN
/CS
MCU_SCK
SCLK
REXT
VDDIO_IN
X_OSCOUT
OSCOUT
VSS_OSCIN
NCTest_OSCOUT
NCTest_VSS_OSCIN
VSS_OSCIN
Figure 5. PCA9957 schematic

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
LED External Power Supply
LED0 open test & ouput
current measurement
LED0 short test
LED0+LED1
LED1+LED2
LED4 open test & ouput
current measurement
LED4 short test
LED8 open test & ouput
current measurement
LED16 open test & ouput
current measurement
LED8 short test LED16 short test
LED12 short test LED20 short test
LED12 open test & ouput
current measurement
LED20 open test & ouput
current measurement
LED voltage select:
OPEN: use external voltage
1-2: +5V
2-3: +3.3V
2-4: +2.5V to +4.1V
VOUT_ADJ:
0.6 / 1.87 * (1.87 + 5.9 + 0) = 2.493V (when R43 = 0)
0.6 / 1.87 * (1.87 + 5.9 + 5) = 4.097V (when R43 = 5K)
VDD_LED
+5V_MCU
+3V3_MCU
LED[0..23] [2,4]
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OMPCA9957LEDEV
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LED
3 5
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LED
3 5
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LED
3 5
___ ___
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R23 0
J88
JUMPER DEFAULT = 1-2
1 2
C13 100pF
J65
JUMPER DEFAULT = OPEN
1 2
J84
JUMPER DEFAULT = OPEN
1 2
J101
JUMPER DEFAULT = 1-2
1 2
R25 0
C26
10uF
J97
JUMPER DEFAULT = OPEN
1 2
D11
LED RED GRN BL
A2
C2
A1 C1
C3
A3
C25 100pF
J115
HDR 1X2 TH
SILK = GND
1
2
J92
JUMPER DEFAULT = OPEN
1 2
J78
JUMPER DEFAULT = OPEN
1 2
J90
JUMPER DEFAULT = 1-2
1 2
R31 0
J117 BANANA RED
SILK = VDD_LED
1 2
C22 100pF
J70
JUMPER DEFAULT = OPEN
1 2
J102
JUMPER DEFAULT = OPEN
1 2
R12 0
C7 100pF
C28 100pF
J82
JUMPER DEFAULT = 1-2
1 2
J94
JUMPER DEFAULT = OPEN
1 2
D5
LED RED GRN BL
A2
C2
A1 C1
C3
A3
C21 100pF
C9 100pF
R26 0
J112
JUMPER DEFAULT = 1-2
1 2
R17 0
D9
INFRARED LED
AC
J72
JUMPER DEFAULT = 1-2
1 2
C20 100pF
R14 0
R44
1.87K
R18 0
J109
JUMPER DEFAULT = OPEN
1 2
C8 100pF
J96
JUMPER DEFAULT = 1-2
1 2
J66
JUMPER DEFAULT = 1-2
1 2
J80
JUMPER DEFAULT = 1-2
1 2
C30 100pF
J98
JUMPER DEFAULT = 1-2
1 2
R9 0
J113
HDR 1X1 + HDR 1X3
JUMPER DEFAULT = 2-4
2
1
4
3
J110
JUMPER DEFAULT = 1-2
1 2
R27 0
J68
JUMPER DEFAULT = OPEN
1 2
D8
INFRARED LED
AC
R42 10K
D10
INFRARED LED
AC
R20 0
C23 100pF
TP15
R22 0
J103
JUMPER DEFAULT = OPEN
1 2
C18 100pF
J64
JUMPER DEFAULT = 1-2
1 2
C31 100pF
C16 100pF
J107
JUMPER DEFAULT = 1-2
1 2
J67
JUMPER DEFAULT = OPEN
1 2
R43 5K
1 3
2
D12
LED RED GRN BL
A2
C2
A1 C1
C3
A3
R11 0
D13
LED RED GRN BL
A2
C2
A1 C1
C3
A3
J73
JUMPER DEFAULT = OPEN
1 2
C14 100pF
J99
JUMPER DEFAULT = OPEN
1 2
R13 0
C17 100pF
J108
JUMPER DEFAULT = OPEN
1 2
D7
LED RED GRN BL
A2
C2
A1 C1
C3
A3
J87
JUMPER DEFAULT = OPEN
1 2
R28 0
C10 100pF
C24 100pF
J104
JUMPER DEFAULT = 1-2
1 2
J116
JUMPER DEFAULT = OPEN
1 2
TP16
J100
JUMPER DEFAULT = 1-2
1 2
R15 0
LP38502SD-ADJ
U3
GND
1
EN
2
IN1
3
IN2
4
OUT1
5
OUT2
6
OUT3
7
ADJ
8
DAP
9
J89
JUMEPR DEFAULT = OPEN
1 2
D3
BLUE
AC
J111
JUMPER DEFAULT = OPEN
1 2
J79
JUMPER DEFAULT = OPEN
1 2
J75
JUMPER DEFAULT = 1-2
1 2
J69
JUMPER DEFAULT = 1-2
1 2
R29 0
J85
JUMPER DEFAULT = 1-2
1 2
R16 0
D2
BLUE
AC
J95
JUMPER DEFAULT = OPEN
1 2
C27 100pF
J81
JUMPER DEFAULT = OPEN
1 2
J83
JUMPER DEFAULT = 1-2
1 2
J91
JUMPER DEFAULT = 1-2
1 2
J71
JUMPER DEFAULT = OPEN
1 2
C19 100pF
R10 0
R8 0
J105
JUMPER DEFAULT = OPEN
1 2
C15 100pF
C32
10uF
R24 0
J77
JUMPER DEFAULT = 1-2
1 2
R19 0
R45 5.9K
C12 100pF
R21 0
J93
JUMPER DEFAULT = 1-2
1 2
C11 100pF
D6
LED RED GRN BL
A2
C2
A1 C1
C3
A3
J76
JUMPER DEFAULT = OPEN
1 2
R30 0
D4
BLUE
AC
J106
JUMPER DEFAULT = 1-2
1 2
C33
10uF
C29 100pF
J86
JUMPER DEFAULT = OPEN
1 2
J74
JUMPER DEFAULT = 1-2
1 2
LED[0..23]
LED_R_0
LED_R_1
LED_R_2
LED_R_3
LED_R_12
LED_R_13
LED_R_14
LED_R_15
LED_R_[0..23]
LED_R_8
LED_R_9
LED_R_10
LED_R_11
LED_R_20
LED_R_21
LED_R_22
LED_R_23
LED0
LED_R_0
LED_R_0
LED1
LED_R_1
LED2
LED_R_2
LED_R_1
LED3
LED_R_3
LED_R_2
LED_R_3
LED_R_4
LED4
LED_R_4
LED5
LED_R_5
LED_R_5
LED6
LED_R_6
LED7
LED_R_7
LED_R_6
LED_R_7
LED_R_8
LED8
LED_R_8
LED_R_9
LED9
LED_R_9
LED10
LED_R_10
LED_R_10
LED11
LED_R_11
LED_R_11
LED_R_12
LED_R_13
LED12
LED_R_12
LED13
LED_R_13
LED_R_14
LED14
LED_R_14
LED15
LED_R_15
LED_R_15
LED_R_16
LED_R_17
LED_R_18
LED_R_19
LED16
LED_R_16
LED17
LED_R_17
LED18
LED_R_18
LED19
LED_R_19
LED20
LED_R_20
LED21
LED_R_21
LED22
LED_R_22
LED23
LED_R_23
LED_R_16
LED_R_17
LED_R_18
LED_R_4
LED_R_19
LED_R_5
LED_R_20
LED_R_6
LED_R_21
LED_R_7
LED_R_22
LED_R_23
VOUT_ADJ
Figure 6. LED portion schematic

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
14 / 27
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
VDD
VDDIO
+3V3_MCU
+5V_MCU
+1V8
LED[0..23] [2,3]
SDO [2]
SCLK [2]
/CS [2]
SDI [2]
/OE [2]
/RESET [2]
REXT [2]
NCTest_VSS_OSCIN [2]
NCTest_OSCOUT [2]
NCTest [2]
Drawing Title:
Size Document Number Rev
Date: Sheet
of
Page Title:
ICAP Classification: CP: IUO: PUBI:
SCH-39109 PDF: SPF-39109 A1
OMPCA9957LEDEV
C
Tuesday, February 25, 2020
SMB connector for fuji
4 5
___ ___
X
Drawing Title:
Size Document Number Rev
Date: Sheet
of
Page Title:
ICAP Classification: CP: IUO: PUBI:
SCH-39109 PDF: SPF-39109 A1
OMPCA9957LEDEV
C
Tuesday, February 25, 2020
SMB connector for fuji
4 5
___ ___
X
Drawing Title:
Size Document Number Rev
Date: Sheet
of
Page Title:
ICAP Classification: CP: IUO: PUBI:
SCH-39109 PDF: SPF-39109 A1
OMPCA9957LEDEV
C
Tuesday, February 25, 2020
SMB connector for fuji
4 5
___ ___
X
1
J23
CON 1 SMB
SILK = LED0_FORCE
J61 BANANA RED
SILK = +3V3_MCU
1
2
J55 BANANA RED
SILK = OE
1
2
1
J36
CON 1 SMB
SILK = LED12_FORCE
J59 BANANA BLACK
SILK = GND
1
2
1
J32
CON 1 SMB
SILK = LED8_FORCE
J57 BANANA BLACK
SILK = GND
1
2
1
J26
CON 1 SMB
SILK = LED3_FORCE
J60 BANANA BLACK
SILK = GND
1
2
1
J49
CON 1 SMB
SILK = GND
1
J30
CON 1 SMB
SILK = LED7_FORCE
1
J20
CON 1 SMB
SILK = NCTest_VSS_OSCIN
1
J51
CON 1 SMB
SILK = GND
1
J138
CON 1 SMB
SILK = LED0_SENSE
1
J15
CON 1 SMB
SILK = SDO
1
J27
CON 1 SMB
SILK = LED4_FORCE
1
J141
CON 1 SMB
SILK = LED11_SENSE
J56 BANANA RED
SILK = RESET
1
2
1
J46
CON 1 SMB
SILK = LED21_FORCE
J53 BANANA RED
SILK = VDD
1
2
J62 BANANA RED
SILK = +5V_MCU
1
2
1
J16
CON 1 SMB
SILK = SCLK
1
J42
CON 1 SMB
SILK = LED17_FORCE
1
J144
CON 1 SMB
SILK = LED23_SENSE
1
J37
CON 1 SMB
SILK = LED13_FORCE
1
J21
CON 1 SMB
SILK = NCTest_OSCOUT
1
J22
CON 1 SMB
SILK = REXT
1
J33
CON 1 SMB
SILK = LED9_FORCE
J58 BANANA BLACK
SILK = GND
1
2
1
J31
CON 1 SMB
SILK = GND
1
J17
CON 1 SMB
SILK = SDI
1
J47
CON 1 SMB
SILK = LED22_FORCE
1
J50
CON 1 SMB
SILK = GND
1
J139
CON 1 SMB
SILK = LED3_SENSE
1
J43
CON 1 SMB
SILK = LED18_FORCE
1
J13
CON 1 SMB
SILK = RESET
1
J28
CON 1 SMB
SILK = LED5_FORCE
1
J128
CON 1 SMB
SILK = NCTest
1
J142
CON 1 SMB
SILK = LED15_SENSE
J165 BANANA RED
SILK = +1V8
1
2
1
J38
CON 1 SMB
SILK = LED14_FORCE
1
J34
CON 1 SMB
SILK = LED10_FORCE
1
J24
CON 1 SMB
SILK = LED1_FORCE
1
J25
CON 1 SMB
SILK = LED2_FORCE
J54 BANANA RED
SILK = VDDIO
1
2
1
J40
CON 1 SMB
SILK = GND
1
J12
CON 1 SMB
SILK = VDD
1
J14
CON 1 SMB
SILK = VDDIO
1
J19
CON 1 SMB
SILK = OE
1
J29
CON 1 SMB
SILK = LED6_FORCE
1
J164
CON 1 SMB
SILK = LED23_FORCE
1
J18
CON 1 SMB
SILK = CS
1
J44
CON 1 SMB
SILK = LED19_FORCE
1
J140
CON 1 SMB
SILK = LED8_SENSE
1
J45
CON 1 SMB
SILK = LED20_FORCE
1
J143
CON 1 SMB
SILK = LED20_SENSE
1
J39
CON 1 SMB
SILK = LED15_FORCE
1
J35
CON 1 SMB
SILK = LED11_FORCE
1
J41
CON 1 SMB
SILK = LED16_FORCE
LED0
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
LED10
LED11
LED12
LED13
LED14
LED15
LED16
LED17
LED18
LED19
LED20
LED21
LED22
LED23
LED[0..23]
VDD
VDDIO
GND
GND
GND
GND
GND
SDO
SCLK
SDI
/CS
REXT
/RESET
/OE
NCTest_VSS_OSCIN
NCTest_OSCOUT
NCTest
LED0
LED3
LED8
LED11
LED15
LED20
LED23
VDD
VDDIO +3V3_MCU
+5V_MCU
+1V8
GND
GND
GND
GND
/OE
/RESET
Figure 7. SMB and banana connector portion schematic

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
15 / 27
7 PCA9957 Demo GUI
7.1 Run PCA9957 GUI V0.1.exe on Windows 7, 8, or 10 PC
1. Click “Connect” button to connect OM13089 board
2. If OM13089 board is detected
a. It shows “OM13089 board connected” in Message Box
b. It shows GUI version number as well as reads out firmware version number in the
OM13089 board
3. If OM13089 board is not detected

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
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a. It shows “OM13089 (LPC 54114) board doesn't find!” in Message Box.
b. Please check whether USB cable is connected to right USB port (J5) on OM13089
board
4. Use Mode1 & 2 command interface to read/write Mode1 & 2 register
a. It shows MOSI and MISO value in Message Box
5. “Write All REG” and “Read All REG” buttons
a. Use “Write All REG” button to write in all register value into PCA9957
b. Use “Read All REG” button to read our all register value from PCA9957

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
17 / 27
6. Use “PWM 0 to 7” page to adjust PWM0 – PWM7 setting
a. Use PWM0 – PWM7 scroll bar to adjust PWM value
7. Use “PWM 16 to 23” page to adjust PWM16 – PWM23 setting
a. Use PWM16 – PWM23 scroll bar to adjust PWM value

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
18 / 27
8. Use “LEDOUT” page to select LED0 - 23 output state control
a. Use LED0 control box to select LED0 output pin to ON state
9. Use “Output Gain” page to set select LED0 - 23 output current setting
a. Use IREF7 Numeric up/down box to set LED7 output current setting to 0x20

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
19 / 27
10. Use “Grad. Control 1” page to select settings for group 0 – 5
a. Ramp enable and rate control, step time control, hold ON/OFF time control and
output gain control for group 0-5 settings
11. Use “Grad. Control 2” page to select below settings
a. Gradation mode and gradation group select for channel 0 to channel 23, gradation
control for group 0 to group 5 settings

NXP Semiconductors UM11196
PCA9957 Evaluation board OMPCA9957LEDEV
UM11196 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 1.0 — 27 April 2020
20 / 27
12. Use “Error Flags” page to read out error status for LEDs output
a. Click on “Read Error Flags” button to read out error status for LED0-23 output
b. Click on “CLRERR” button to clear error flags.
13. Use “Other” page to select below settings
a. Group duty cycle control, group frequency, Offset/delay on LEDn outputs,
brightness control for all LEDn, and output gain control for all registers IREF0 to
IREF23 settings