SNAU306 June 2024 LMKDB1104
The LMKDB1104 has four registers where four different slew rate values can be stored. After storing the desired slew rate values in SLEWRATE_OPT_# registers, 1 of those 4 slew rates can be assigned to each output by using the drop-down menus next to the desired output. There are 16 different slew rate values possible, where 0x0 is the fastest slew rate and 0xF is the slowest slew rate.
The default slew rate values for each SLEWRATE_OPT_X are shown in Table 5-2. The default slew rate for all outputs is set to SLEWRATE_OPT_2 which is set to 0x6. The drop-down menu can be used to change the slew rate of each output from the default. To use SMBus to set the slew rate of each output, SLEWRATE_CTRL_MODE needs to be set to 1 (SLEWRATE_CTRL_MODE = 1). The LMKDB1104 default is SLEWRATE_CTRL_MODE = 0, which sets all the outputs' slew rates through the SLEWRATE_PIN.
Register Field Name | Default Value | Default Slew Rate |
---|---|---|
SLEWRATE_OPT_1 | 0x0 | Fastest |
SLEWRATE_OPT_2 | 0x6 | Fast (default for all outputs) |
SLEWRATE_OPT_3 | 0xA | Slow |
SLEWRATE_OPT_4 | 0xF | Slowest |