33984 datasheet(28/38 Pages) FREESCALE

28 / 38 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33984

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

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 13. 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 18).

• 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] =111

Null Data. No previous register Read Back command

received, so bits OD2:OD0 are null, or 000.

Table 17. Fault Register

OD7

OD6

OD5

OD4

OD3

OD2

OD1

OD0

OTF

OCHFs OCLFs

OLFs

UVF

OVF

FAULT

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 (FAULT) = This flag reports a fault and is reset by a read

operation.

FAULT report of any fault on HS0 or HS1

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).

Table 18. Pin Register

OD3

OD2

OD1

OD0

IN1 Pin

IN0 Pin

FSI Pin

WAKE Pin

33984 Datasheet(PDF) 28 Page - Freescale Semiconductor, Inc

33984 Datasheet(HTML) 28 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Datasheet Download

Link URL