MAX15500 Datasheet, PDF (23/27 Pages) Maxim Integrated Products – Industrial Analog Current/Voltage-Output Conditioners

Industrial Analog Current/
Voltage-Output Conditioners
DIN X
SCLK
t_CSH
DOUT ^Z
CS_
ACTIVE FRAME
DIN13 DIN12 DIN11 DIN10 DIN9 DIN8 DIN7 DIN6 DIN5 DIN4 DIN3 DIN2 DIN1 DIN0 X
t_DS
t_CH
t_CP
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
t_CSS
t_CH
t_CL tDOH
t_DOT
t_DOZ
DOUT9 DOUT8 DOUT7 DOUT6 DOUT5 DOUT4 DOUT3 DOUT2 DOUT1 DOUT0
t_DOE
READY
X
16 17
t_CR
X
X
HIGH-Z
t_CSV
t_CSR
Figure 9. Extended SPI Programming Operation (Daisy-Chained Applications)
ERROR REGISTER UPDATED,
ERROR RE-EVALUATED
SCLK
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
t_CSH
t_CSS
DOUT ^Z
DOUT9
t_DOE
t_CSDOZ
CS_
OPERATION ABORTED
Figure 10. Aborted SPI Programming Operation (Invalid, Showing tCSDOZ and Internal Activity)
X
HIGH-Z
Readback Operations
Write to the command addresses 4h or 5h to read back the
configuration register data or the internal error information
through DOUT[9:0]. For error readback operations, each
bit corresponds to a specific error condition, with multiple
bits indicating multiple error conditions present.
Intermittent Errors
An intermittent error is defined as an error that is detected
and is resolved before the error register is read back.
When the error is resolved without intervention, the inter-
mittent bit (bit 9) is set. The output short-circuit and output
open-load errors trigger the intermittent bit. Internal over-
temperature and supply voltage brownout do not trigger
the intermittent bit.
Error Reporting Applications
The ERROR output is typically connected to an inter-
rupt input of the system microcontroller. The MAX15500/
MAX15501 only issue an interrupt when a new error con-
dition is detected. The devices do not issue interrupts
when errors (either individual or multiple) are resolved
or when already reported errors persist. The system
microcontroller resets ERROR when the system micro-
controller reads back the error register. ERROR does not
assert again unless a different error occurs.
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