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NXP Semiconductors
PCA9632
4-bit Fm+ I 2 C-bus low power LED driver
? slave devices that are designed to respond to the General Call address (0000 000)
? High-speed mode (Hs-mode) master code (0000 1XX)
slave address
slave address
1
1
0
0
0
A1
A0 R/W
1
1
0
0
0
1
0
R/W
fixed
hardware
selectable
fixed
a. 8-pin version
Fig 6.
Slave address
002aab318
b. 10-pin version
002aab295
The last bit of the address byte defines the operation to be performed. When set to logic 1
a read is selected, while a logic 0 selects a write operation.
7.1.2 LED All Call I 2 C-bus address
? Default power-up value (ALLCALLADR register): E0h or 1110 000
? Programmable through I 2 C-bus (volatile programming)
? At power-up, LED All Call I 2 C-bus address is enabled. PCA9632 sends an ACK when
E0h (R/W = 0) or E1h (R/W = 1) is sent by the master.
See Section 7.3.8 “ LED All Call I 2 C-bus address, ALLCALLADR ” for more detail.
Remark: The default LED All Call I 2 C-bus address (E0h or 1110 000) must not be used as
a regular I 2 C-bus slave address since this address is enabled at power-up. All the
PCA9632s on the I 2 C-bus will acknowledge the address if sent by the I 2 C-bus master.
7.1.3 LED Sub Call I 2 C-bus addresses
? 3 different I 2 C-bus addresses can be used
? Default power-up values:
– SUBADR1 register: E2h or 1110 001
– SUBADR2 register: E4h or 1110 010
– SUBADR3 register: E8h or 1110 100
? Programmable through I 2 C-bus (volatile programming)
? At power-up, Sub Call I 2 C-bus addresses are disabled. PCA9632 does not send an
ACK when E2h (R/W = 0) or E3h (R/W = 1), E4h (R/W = 0) or E5h (R/W = 1), or
E8h (R/W = 0) or E9h (R/W = 1) is sent by the master.
See Section 7.3.7 “ I 2 C-bus subaddress 1 to 3, SUBADRx ” for more detail.
Remark: The default LED Sub Call I 2 C-bus addresses may be used as regular I 2 C-bus
slave addresses as long as they are disabled.
PCA9632
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 27 July 2011
? NXP B.V. 2011. All rights reserved.
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