MAX5970ETX+ Maxim Integrated Products, MAX5970ETX+ Datasheet - Page 31

• Manufacturer Part Number: MAX5970ETX+
• Description: IC CTLR HOT-SWAP DUAL 36TQFN
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5970ETX+

• Applications: General Purpose, PCI Express
• Internal Switch(s): No
• Voltage - Supply: 2.7 V ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The contents of a buffer can be retrieved as a block read
of either fifty 10-bit values (spanning 2 bytes each) or of
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Each of the four buffers can also be stopped under user
control by register cbuf_chx_store (see Table 42).
The MAX5970 features four 10-bit “circular buffers” (in
volatile memory) that contain a history of the 50 most-
recent voltage and current digital conversion results for
each hot-swap channel. These circular buffers can be
read back through the I
new data to the buffer for a given signal is stopped under
any of the following conditions:
• The corresponding channel is shut down because of
Table 41. Circular Buffer Read Addresses
Table 42. Circular Buffer Control Register Format
Table 43. Circular Buffer Resolution Register Format
Description:
Register Title:
Register Address:
Description:
Register Title:
Register Address:
Current and Voltage Monitor and 4 LED Drivers
a fault condition.
ADDRESS
bit 7
bit 7
0x46
0x47
0x48
0x49
—
—
R
R
______________________________________________________________________________________
cbuf_ba_ch0_v
cbuf_ba_ch1_v
cbuf_ba_ch0_i
bit 6
bit 6
cbuf_ba_ch_i
—
—
R
R
NAME
2
C interface. The recording of
Circular buffer run-stop control register (per-buffer control: 1 = run, 0 = stop)
cbuf_chx_store
0x19
Circular buffer read-out resolution: high-order byte only, or 8-2 split 10-bit data
(per-buffer control: 1 = high-order byte output, 0 = full-resolution 10-bit output)
cbufrd_hibyonly
0x3F
bit 5
bit 5
—
—
R
R
Base address for channel 0 voltage buffer block read
Base address for channel 0 current buffer block read
Base address for channel 1 voltage buffer block read
Base address for channel 1 current buffer block read
Circular Buffer
bit 4
bit 4
—
—
R
R
Ch1_i_run
Ch1_i_res
bit 3
bit 3
R/W
R/W
fifty high-order bytes, depending on the per-signal bit
settings of register cbufrd_hibyonly (see Table 43).
• Clearing appropriate bits in register cbuf_chx_store.
• A read of the circular buffer base address is per-
• The corresponding channel is turned off by a combi-
The buffers allow the user to recall the voltage and cur-
rent waveforms for analysis and troubleshooting. The
buffer contents are accessed through the I
at four fixed addresses in the MAX5970 register address
space (see Table 41).
formed through the I
nation of the Chx_EN1, Chx_EN2, or ON_ signals.
DESCRIPTION
Ch1_v_run
Ch1_v_res
bit 2
bit 2
R/W
R/W
Ch0_i_run
Ch0_i_res
2
C interface.
bit 1
bit 1
R/W
R/W
Ch0_v_run
Ch0_v_res
bit 0
bit 0
R/W
R/W
2
C interface
VALUE
VALUE
RESET
RESET
0x0F
0x0F
31