MAX17039EVKIT+ Maxim Integrated, MAX17039EVKIT+ Datasheet - Page 10

• Manufacturer Part Number: MAX17039EVKIT+
• Description: Power Management IC Development Tools Dual-Output 3-Phase + 1 Phase Quick-PWM Controller for VR12/IMVP-7
• Manufacturer: Maxim Integrated
• Series: MAX17039r

MAX17039 Evaluation Kit
The MAX17039 supports the serial VID interface. Serial
VID is a 3-wire (VCLK, VDIO, ALERT) serial synchronous
interface used to transfer power-management informa-
tion between a master (typically a microprocessor) and a
slave (typically a voltage regulator controller). The link is
between one master device (usually a microprocessor)
and multiple slave devices (usually a VR controller) on
the same bus. There is a 4-bit addressing scheme for
the slave devices.
The clock is source-synchronous from the CPU. The
master drives the VCLK signal with a low-voltage open-
Figure 4. MAX17039 Evaluation Kit Software (OTP/Pin-programmed & Scratch Pad Registers Tab)
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Serial VID Interface (VCLK, VDIO, ALERT)
drain driver. The master can shut down the VCLK signal
to save power when no data transfer is needed. The
VDIO line is a low-voltage, open-drain data signal that
the master and slave use to send information to each
other. The ALERT line is an active-low signal driven from
the slave device, indicating to the master that the status
register needs to be read.
The on-board FPGA is the serial VID bus master and the
MAX17039 is the slave. The bus operates at a maximum
frequency of 33MHz.