max5961 Maxim Integrated Products, Inc., max5961 Datasheet - Page 34

• Manufacturer Part Number: max5961
• Description: 0 To 16v, Quad, Hot-swap Controller With 10-bit Current And Voltage Monitor
• Manufacturer: Maxim Integrated Products, Inc.

0 to 16V, Quad, Hot-Swap Controller
with 10-Bit Current and Voltage Monitor
The MAX5961 features eight 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
• A read of the circular buffer base address is per-
Table 42. Circular Buffer Control Register Format
34
Table 41. Circular Buffer Read Addresses
Table 43. Circular Buffer Resolution Register Format
Description:
Register Title:
Register Address:
Description:
Register Title:
Register Address:
a fault condition
formed through the I
ADDRESS
ch4_i_run
ch4_i_res
______________________________________________________________________________________
0x80
0x81
0x82
0x83
0x84
0x85
0x86
0x87
bit 7
bit 7
R/W
R/W
ch4_v_run
ch4_v_res
cbuf_ba_ch1_v
cbuf_ba_ch2_v
cbuf_ba_ch3_v
cbuf_ba_ch4_v
cbuf_ba_ch1_i
cbuf_ba_ch2_i
cbuf_ba_ch3_i
cbuf_ba_ch4_i
bit 6
bit 6
R/W
R/W
NAME
2
C interface
2
C interface. The recording of
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
0x6D
Circular buffer run-stop control register (per-buffer control: 1 = run, 0 = stop)
cbuf_chx_store
0x31
ch3_i_run
ch3_i_res
bit 5
bit 5
R/W
R/W
Base address for channel 1 voltage buffer block read
Base address for channel 1 current buffer block read
Base address for channel 2 voltage buffer block read
Base address for channel 2 current buffer block read
Base address for channel 3 voltage buffer block read
Base address for channel 3 current buffer block read
Base address for channel 4 voltage buffer block read
Base address for channel 4 current buffer block read
Circular Buffer
ch3_v_run
ch3_v_res
bit 4
bit 4
R/W
R/W
ch2_i_run
ch2_i_res
bit 3
bit 3
R/W
• 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 eight fixed addresses in the MAX5961 register
address space (see Table 41).
Each of the eight buffers can also be stopped under
user control by register cbuf_chx_store (see Table 42).
The contents of a buffer can be retrieved as a block
read of either 50 10-bit values (spanning 2 bytes each)
or of 50 high-order bytes, depending on the per-signal
bit settings of register cbufrd_hibyonly (see Table 43).
R/W
nation of the Chx_EN1, Chx_EN2, or ON_ signals
DESCRIPTION
ch2_v_run
ch2_v_res
bit 2
R/W
bit 2
R/W
ch1_i_run
ch1_i_res
bit 1
R/W
R/W
bit 1
ch1_v_run
ch1_v_res
R/W
bit 0
R/W
bit 0
2
C interface
VALUE
RESET
RESET
VALUE
0x00
0xFF