FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Previous Address SOA[2:0]=101
Table 17. Fault Register
• SOA3 = 0. The returned data contain the programmed
values in the OSDR. Bit OD3 (FSM_HS0) reflects the
state of the output HS0 in the Fail-safe Mode after a
watchdog timeout occurs.
• SOA3 = 1. The returned data contain the programmed
values in the WDR. Bit OD2 (WDTO) reflects the status
of the watchdog circuitry. If WDTO bit is Logic [1], the
watchdog has timed out and the device is in Fail-safe
Mode. If WDTO is Logic [0], the device is in Normal
Mode (assuming the device is powered and not in Sleep
Mode), with the watchdog either enabled or disabled.
Bit OD3 (FSM_HS1) reflects the state of the output HS1
in the Fail-safe Mode after a watchdog timeout occurs.
OD7
OD6
OD5
OD4
OD3
OD2
OD1
OD0
s
OTF OCHFs OCLFs OLFs
UVF
OVF FAULTs
OD7 (s) = Selection of output: Logic [0] = HS0, Logic [1] = HS1.
OD6 (OTF) = Over-temperature Flag.
OD5 (OCHFs) = Over-current High Flag. (This fault is latched.)
OD4 (OCLFs) = Over-current Low Flag. (This fault is latched.)
OD3 (OLFs) = Open Load Flag.
OD2 (UVF) = Under-voltage Flag. (This fault is latched or not latched.)
OD1 (OVF) = Over-voltage Flag.
OD0 (FAULTs) = This flag reports a fault and is reset by a read
operation.
Previous Address SOA[2:0] =110
Note The FS pin reports a fault. For latched faults, this pin is reset by
a new Switch ON command (via SPI or direct input IN).
• SOA3 = 0. OD3:OD0 return the state of the IN1, IN0,
FSI, and WAKE pins, respectively (Table 18).
Previous Address SOA[2:0]=011
Table 18. Pin Register
Data returned in bits OD1 and OD0 are current values for
the over-current fault blanking time, illustrated in Table 13. Bit
OD2 reports if the over-current detection timeout feature is
active. OD3 reports if the open load circuitry is active.
OD3
OD2
OD1
OD0
IN1 Pin
IN0 Pin
FSI Pin
WAKE Pin
• SOA3 = 1. The returned data contain the programmed
values in the UOVR. Bit OD1 reflects the state of the
under-voltage protection and bit OD0 reflects the state
of the over-voltage protection. Refer to Table 16).
Previous Address SOA[2:0]=100
The returned data contain the programmed values in the
DICR.
Previous Address SOA[2:0]=111
Null Data. No previous register Read Back command
received, so bits OD2:OD0 are null, or 000.
33984
Analog Integrated Circuit Device Data
Freescale Semiconductor
28
FREESCALE [ Freescale ]
