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PCA9552 Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer PCA9552
Beschreibung 16-bit I2C LED driver with programmable blink rates
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 21 Seiten
PCA9552 Datasheet, Funktion
INTEGRATED CIRCUITS
PCA9552
16-bit I2C LED driver with programmable
blink rates
Product data sheet
Supersedes data of 2003 May 02
2004 Oct 01
Philips
Semiconductors






PCA9552 Datasheet, Funktion
Philips Semiconductors
16-bit I2C LED driver with programmable blink rates
Product data sheet
PCA9552
PWM0 — PWM REGISTER 0
bit 7 6 5 4 3 2 1 0
default 1 0 0 0 0 0 0 0
The PWM0 register determines the duty cycle of BLINK0. The
outputs are LOW (LED off) when the count is less than the value in
PWM0 and HIGH when it is greater. If PWM0 is programmed with
00h, then the PWM0 output is always LOW.
The duty cycle of BLINK0 is:
256 – PWM0
256
PSC1 — FREQUENCY PRESCALER 1
bit 7 6 5 4 3 2
default 1 1 1 1 1 1
PSC1 is used to program the period of PWM output.
1
1
0
1
The
period
of
BLINK1
+
(PSC1 ) 1)
44
PWM1 — PWM REGISTER 1
bit 7 6 5 4 3 2 1 0
default 1 0 0 0 0 0 0 0
The PWM1 register determines the duty cycle of BLINK1. The
outputs are LOW (LED off) when the count is less than the value in
PWM1 and HIGH when it is greater. If PWM1 is programmed with
00h, then the PWM1 output is always LOW.
The duty cycle of BLINK1 is:
256 – PWM1
256
LS0 — LED 0–3 SELECTOR
LED 3
LED 2
LED 1
bit 7 6 5 4 3 2
default 0 1 0 1 0 1
LED 0
10
01
LS1 — LED 4–7 SELECTOR
LED 7
LED 6
bit 7 6 5 4
default 0 1 0 1
LED 5
32
01
LED 4
10
01
LS2 — LED 8–11 SELECTOR
LED 11
LED 10
bit 7 6 5 4
default 0 1 0 1
LED 9
32
01
LED 8
10
01
LS3 — LED 12–15 SELECTOR
LED 15
LED 14
bit 7 6 5 4
default 0 1 0 1
LED 13
32
01
LED 12
10
01
The LSx LED select registers determine the source of the LED data.
00 = Output is set LOW (LED on)
01 = Output is set Hi-Z (LED off – default)
10 = Output blinks at PWM0 rate
11 = Output blinks at PWM1 rate
PINS USED AS GENERAL PURPOSE I/Os
LED pins not used to control LEDs can be used as general purpose
I/Os.
For use as input: Set LEDx to high-impedance (01) and then read
the pin state via the input register.
For use as output: Connect external pull-up resistor to the pin and
size it according to the DC recommended operating characteristics.
LED output pin is HIGH when the output is programmed as
high-impedance, and LOW when the output is programmed LOW
through the “LED selector” register. The output can be pulse-width
controlled when PWM0 or PWM1 are used.
POWER-ON RESET
When power is applied to VDD, an internal Power-On Reset holds
the PCA9552 in a reset condition until VDD has reached VPOR. At
this point, the reset condition is released and the PCA9552 registers
are initialized to their default states, all the outputs in the off state.
Thereafter, VDD must be lowered below 0.2 V to reset the device.
EXTERNAL RESET
A reset can be accomplished by holding the RESET pin LOW for a
minimum of tW. The PCA9552 registers and I2C state machine will
be held in their default state until the RESET input is once again
HIGH.
This input requires a pull-up resistor to VDD if no active connection is
used.
2004 Oct 01
6

6 Page









PCA9552 pdf, datenblatt
Philips Semiconductors
16-bit I2C LED driver with programmable blink rates
Product data sheet
PCA9552
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134)
SYMBOL
PARAMETER
VDD
VI/O
II/O
ISS
Ptot
Tstg
Tamb
Supply voltage
DC voltage on an I/O
DC output current on an I/O
Supply current
Total power dissipation
Storage temperature range
Operating ambient temperature
CONDITIONS
MIN
–0.5
VSS – 0.5
–65
–40
MAX
6.0
5.5
±25
200
400
+150
+85
UNIT
V
V
mA
mA
mW
°C
°C
HANDLING
Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is desirable to take
precautions appropriate to handling MOS devices. Advice can be found in Data Handbook IC24 under ”Handling MOS devices”.
DC CHARACTERISTICS
VDD = 2.3 V to 5.5 V; VSS = 0 V; Tamb = –40 °C to +85 °C; unless otherwise specified. TYP at 3.3 V and 25 °C.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Supplies
VDD Supply voltage
IDD Supply current
Istb Standby current
IDD
Additional standby current
VPOR Power-on reset voltage (Note 1)
Input SCL; input/output SDA
2.3 — 5.5 V
Operating mode; VDD = 5.5 V; no load;
VI = VDD or VSS; fSCL = 100 kHz
350
550
µA
Standby mode; VDD = 5.5 V; no load;
VI = VDD or VSS; fSCL = 0 kHz
2.1
5.0
µA
Standby mode; VDD = 5.5 V; Every
LED I/O at VIN = 4.3 V; fSCL = 0 kHz
——
2 mA
VDD = 3.3 V; no load; VI = VDD or VSS
1.7
2.2
V
VIL
VIH
IOL
IL
CI
I/Os
LOW-level input voltage
HIGH-level input voltage
LOW-level output current
Leakage current
Input capacitance
VOL = 0.4 V
VI = VDD = VSS
VI = VSS
–0.5
0.7 VDD
3
–1
6.5
4.4
0.3 VDD
5.5
+1
5
V
V
mA
µA
pF
VIL LOW-level input voltage
VIH HIGH-level input voltage
IOL LOW-level output current
IL Input leakage current
CIO Input/output capacitance
Select Inputs A0, A1, A2 / RESET
VOL = 0.4 V; VDD = 2.3 V; Note 2
VOL = 0.4 V; VDD = 3.0 V; Note 2
VOL = 0.4 V; VDD = 5.0 V; Note 2
VOL = 0.7 V; VDD = 2.3 V; Note 2
VOL = 0.7 V; VDD = 3.0 V; Note 2
VOL = 0.7 V; VDD = 5.0 V; Note 2
VDD = 3.6 V; VI = 0 V or VDD
–0.5 —
2.0 —
9—
12 —
15 —
15 —
20 —
25 —
–1 —
— 2.6
0.8 V
5.5 V
— mA
— mA
— mA
— mA
— mA
— mA
1 µA
5 pF
VIL LOW-level input voltage
–0.5 — 0.8 V
VIH HIGH-level input voltage
2.0 — 5.5 V
ILI Input leakage current
–1 —
1 µA
CI Input capacitance
VI = VSS
— 2.3 5 pF
NOTES:
1. VDD must be lowered to 0.2 V in order to reset part.
2. Each I/O must be externally limited to a maximum of 25 mA and each octal (LED0–LED7 and LED8–LED15) must be limited to a maximum
current of 100 mA for a device total of 200 mA.
2004 Oct 01
12

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SeitenGesamt 21 Seiten
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