pca9632 NXP Semiconductors, pca9632 Datasheet - Page 12

• Manufacturer Part Number: pca9632
• Description: Pca9632 4-bit Fm I?c-bus Low Power Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9632_1
Objective data sheet
7.3.8 LED All Call I
7.4 Power-on reset
Subaddresses are programmable through the I
E4h, E8h, and the device(s) will not acknowledge these addresses right after power-up
(the corresponding SUBx bit in MODE1 register is equal to 0).
Once subaddresses have been programmed to their right values, SUBx bits need to be
set to 1 in order to have the device acknowledging these addresses (MODE1 register).
Only the 7 MSBs representing the I
register is a read-only bit (0).
When SUBx is set to 1, the corresponding I
an I
Table 12.
Legend: * default value.
The LED All Call I
at the same time (ALLCALL bit in register MODE1 must be equal to 1, power-up default
state). This address is programmable through the I
an I
sub call.
Only the 7 MSBs representing the All Call I
ALLCALLADR register is a Read-only bit (0).
If ALLCALL bit = 0, the device does not acknowledge the address programmed in register
ALLCALLADR.
When power is applied to V
condition until V
PCA9632 registers and I
zeroes) causing all the channels to be deselected. Thereafter, V
0.2 V to reset the device.
Address
0Ch
2
2
C-bus read or write sequence.
C-bus read or write sequence. The register address can be programmed as a
Register
ALLCALLADR
ALLCALLADR - LED All Call I
description
2
DD
C-bus address, ALLCALLADR
2
C-bus address allows all the PCA9632s in the bus to be programmed
has reached V
Rev. 01 — 28 September 2007
2
C-bus state machine are initialized to their default states (all
Bit
7:1
0
DD
, an internal Power-on reset holds the PCA9632 in a reset
Symbol
AC[7:1]
AC[0]
POR
2
C-bus subaddress are valid. The LSB in SUBADRx
. At this point, the reset condition is released and the
2
C-bus address register (address 0Ch) bit
2
2
Access Value
R/W
R only
C-bus address are valid. The LSB in
C-bus subaddress can be used during either
2
4-bit Fm+ I
C-bus. Default power-up values are E2h,
2
C-bus and can be used during either
1110 000*
0*
2
C-bus low power LED driver
DD
Description
ALLCALL I
address register
reserved
must be lowered below
PCA9632
© NXP B.V. 2007. All rights reserved.
2
C-bus
12 of 32