CAT9532
Application Information
Command Description
I 2 C Data
Programming Example
1
START
The following programming sequence is an example how
to set:
? LED0 to LED3: ON
? LED4 to LED7: Dimming at 30% brightness; Blink 1:
152 Hz, duty cycle 30%
? LED8 to LED11: Blink at 2 Hz with 50% duty cycle
(Blink 2)
? LED12 to LED15: OFF
5V
5V
2
3
4
5
6
7
8
Send Slave address, A0 ? A2 = low
Command Byte: AI=”1”; PSC0 Addr
Set Blink 1 at 152Hz, T_Blink1 = 1/152
Write PSC0 = 0
Set PWM0 duty cycle to 30%
PWM0 / 256 = 0.3; Write PWM0=77
Set Blink 2 at 2Hz, T_Blink1 = 1/2
Write PSC1 = 75
Set PWM1 duty cycle to 50%
PWM1 / 256 = 0.5; Write PWM1=128
Write LS0: LED0 to LED3 = ON
C0h
12h
00h
4Dh
4Bh
80h
55h
V CC
10 k W (x 3)
9
Write LS1: LED4 to LED7 at Blink1
AAh
V CC
SDA
CAT9532 LED7
LED10
LED11
LED12
SDA
SCL
RESET
GND
I 2 C/SMBus
MASTER
A2
A1
A0
V SS LED13
LED0
LED1
LED2
SCL LED3
LED4
RESET LED5
LED6
LED8
LED9
LED14
LED15
GPIOs
10
11
12
Write LS2: LED8 to LED11 at Blink2
Write LS3: LED12 to LED15 = OFF
STOP
FFh
00h
Figure 14. Typical Application
Figure 15. q JA Transient Response Curve for TSSOP ? 24
Table 11. THERMAL RATINGS
Parameters
q JA TSSOP ? 24 (Note 8)
mm 2 )
8. Based on JEDEC EIA/JESD51 ? 3 (2.0 oz Cu, 100
http://onsemi.com
11
Ratings
124
Units
° C/W
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