DS64BR111: Pin 6 & 16 when ENSMB=1

Go Bravos

Part Number: DS64BR111

Team,

The pin descriptions on page 3 has 2 sections, one for ENSMB=1 (SMBUS mode) and one for ENSMB=0 (pin mode). I am using it in ENSMB=1. Pin 6 and 16 are only defined in the ENSMB=0 part of the table. What are these pins on the ENSMB=1 mode.

Specifically, pin 16. Does it need a LOW if I am running at 3.3V?

Same for pin 6. Does it need a low for output to be enabled?

over 3 years ago

0 Nasser Mohammadi over 3 years ago

TI__Guru* 93570 points

Hi Bravos,

These two pins are still active when you operate in SMBus mode - please refer to the data sheet for detailed settings.

Please note if VOD_SEL is pulled high while operating in SMBus mode, SMBus address is at 0xB0 as noted in the data sheet.

Regards,, Nasser

0 Go Bravos over 3 years ago in reply to Nasser Mohammadi

TI__Expert 6090 points

Hi Nasser,

Thank you. This is the way we are connecting the device. Can you please review?

Signal	Pin	Connection
INA+, INA-,INB+, INB-,	24,23,11,12	Inputs
OUTA+, OUTA-, OUTB+, OUTB-,	7,8,20,19	outputs
ENSMB	3	High, 4.7K to 3.3V
SCL	5	I2Cdevice = clk with 4.7k pull up to 3.3V
SDA	4	I2Cdevice = data with 4.7k pull up to 3.3V
AD0-AD3	10,9,2,1	4.7K to GND slider resistors
READEN#	17	4.7K to GND
DONE#	18	NC
TX_DIS	6	4.7K to GND
VDD_SEL	16	4.7K to GND
LOS	13	To FPGA with 4.7k pullup
SD_TH	14	Float with TP
VDD	21,22	Two 0.100 uF cap, one for each pin
Vin	15	3.3V
GND	DAP	GND

0 Nasser Mohammadi over 3 years ago in reply to Go Bravos

TI__Guru* 93570 points

Hi Bravos,

These connections look good to me.

Please refer to the EVM user guide schematic for different options on each pin. Here is a link to this schematic - note page 9.

https://www.ti.com/lit/ug/snlu181a/snlu181a.pdf?ts=1619106649447&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FDS64BR111EVK

Regards,,Nasser

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DS64BR111: Pin 6 & 16 when ENSMB=1