STLED325QTR STMicroelectronics, STLED325QTR Datasheet - Page 48

• Manufacturer Part Number: STLED325QTR
• Description: LED Lighting Drivers I2C interfaced LED controller/driver
• Manufacturer: STMicroelectronics

Specifications of STLED325QTR

• Product Category: LED Lighting Drivers
• Rohs: yes
• Input Voltage: 5 V
• Maximum Supply Current: 2 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 40 C
• Power Dissipation: 1200 mW

Commands
7.3
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In fixed address mode, the address command has to be sent followed by the display data.
When next byte of data is to be written, address command has to be sent again before new
display data byte.
When the user wants to read the RTC data from the specified memory location of RTC, the
user must first set the address of the RTC location using “Address Setting Command” after
which send the “Read RTC Register” command.
If the address pointer was located in the display memory location and user issues a “Read
RTC Register” command without sending the “Address Setting Command”, the RTC data is
read from the address location of the previous value of the RTC address pointer.
Thus before reading the RTC register data, the user must set the proper address for RTC
using “Address Setting Command”.
Prior to writing data to the RTC registers, the address of the RTC must be set using the
Address Setting command. Else, if the address pointer happens to be pointing at the LED
display memory, then the data will be written to the address location of the previous value in
the RTC address pointer. This is vice-versa true for the LED display memory.
Configuration data
Up to a maximum of 5-bytes are sent from LSB to MSB as configuration data. The 29-bytes
represent the following configuration information:
On power application, the normal operation mode and address increment mode is set with
the default display memory address set to 0x10 (start of display memory address location).
Refer to the display memory section.
In the auto increment address mode, the address command is sent once followed by the
data bytes.
Alternatively, the data command can be sent followed by the data bytes. In this case, when
new display data is to be written, the last value of the address will be used and then
Decoded/Raw
RC setting
MSB (b7)
config for
Interrupt
GPIO1
B7
B7
B7
config for
Not used
Interrupt
GPIO0
B6
B6
B6
RC Protocol setting
enable config
for GPIOs
Interrupt
B5
B5
B5
Doc ID 17576 Rev 1
configuration
Front Panel Hot Key Bank 1
Front Panel Hot Key Bank 2
For display
(input or
output)
GPIO1
enable
B4
B4
B4
Byte 2
Byte 3
Byte 4
Byte 5
Byte1
configuration
(input or
output)
GPIO0
B3
B3
B3
Digit 5 discrete
LED config
For display dimming setting
Guard timer setting
B2
B2
B2
7-segment LED display
configuration setting
B1
B1
B1
STLED325
LSB (b0)
B0
B0
B0