33988 Datasheet, PDF (27/34 Pages) Freescale Semiconductor, Inc – Dual Intelligent High-current Self-protected Silicon High Side Switch (8.0mΩ)

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Table 16. Fault Register
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.
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).
Previous Address SOA[2:0] = 011
Data returned in bits OD1 and OD0 are current values for
the over-current fault blanking time, illustrated in Table 12. Bit
OD2 reports if the over-current detection timeout feature is
active. OD3 reports if the open load circuitry is active.
Previous Address SOA[2:0] =100
The returned data contain the programmed values in the
DICR.
Previous Address SOA[2:0] = 101
• 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.
Previous Address SOA[2:0] = 110
• SOA3 = 0. OD3:OD0 return the state of the IN1, IN0,
FSI, and WAKE pins, respectively (Table 17).
Table 17. Pin Register
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 15).
Previous Address SOA[2:0] =111
Null Data. No previous register Read Back command
received, so bits OD2:OD0 are null, or 000.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33988
27