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PCA9633DP2 数据表(PDF) 14 Page - NXP Semiconductors

部件名 PCA9633DP2
功能描述  4-bit Fm I2C-bus LED driver
PDF  42 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCA9633DP2 数据表(HTML) 14 Page - NXP Semiconductors

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PCA9633_3
© NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 03 — 20 December 2006
14 of 42
NXP Semiconductors
PCA9633
4-bit Fm+ I2C-bus LED driver
When DMBLNK bit is programmed with 1, GRPPWM and GRPFREQ registers define a
global blinking pattern, where GRPFREQ contains the blinking period (from 24 Hz to
10.73 s) and GRPPWM the duty cycle (ON/OFF ratio in %).
7.3.5 Group frequency, GRPFREQ
GRPFREQ is used to program the global blinking period when DMBLNK bit (MODE2
register) is equal to 1. Value in this register is a ‘Don’t care’ when DMBLNK = 0.
Applicable to LED outputs programmed with LDRx = 11 (LEDOUT register).
Blinking period is controlled through 256 linear steps from 00h (41 ms, frequency 24 Hz)
to FFh (10.73 s).
(in seconds)
7.3.6 LED driver output state, LEDOUT
LDRx = 00 — LED driver x is off (default power-up state).
LDRx = 01 — LED driver x is fully on (individual brightness and group dimming/blinking
not controlled).
LDRx = 10 — LED driver x individual brightness can be controlled through its PWMx
register.
LDRx = 11 — LED driver x individual brightness and group dimming/blinking can be
controlled through its PWMx register and the GRPPWM registers.
duty cycle
GDC 7:0
[]
256
---------------------------
=
Table 12.
GRPFREQ - Group Frequency register (address 07h) bit description
Legend: * default value.
Address
Register
Bit
Symbol
Access
Value
Description
07h
GRPFREQ
7:0
GFRQ[7:0]
R/W
0000 0000*
GRPFREQ register
global blinking period
GFRQ 7:0
[] 1
+
24
----------------------------------------
=
Table 13.
LEDOUT - LED driver output state register (address 08h) bit description
Legend: * default value.
Address
Register
Bit
Symbol
Access
Value
Description
08h
LEDOUT
7:6
LDR3
R/W
00*
LED3 output state control
5:4
LDR2
R/W
00*
LED2 output state control
3:2
LDR1
R/W
00*
LED1 output state control
1:0
LDR0
R/W
00*
LED0 output state control



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