Datasheet

Data Sheet 17 Rev. 2.4, 2007-08-08
TLE6288R
SPI
5.3 SPI Diagnostics
As soon as a fault occurs for longer than the fault filter time, the fault information is latched into the diagnosis
register (and the Fault pin will change from high to low state). A new error on the same channel will overwrite the
old error report. Serial data out pin (SO) is in a high impedance state when CS
is high. If CS receives a LOW signal,
all diagnosis bits can be shifted out serially. If the sent command was valid (see Note in Chapter 5.5) the rising
edge of CS
will reset the diagnosis registers (except the channel OT flag) and restart the fault filter time. In case
of an invalid command the device will ignore the data bits and the diagnosis register will not be reset at the rising
CS
edge.
Figure 9 Two Bits per Channel Diagnostic Feedback plus two Overtemperature Flags
For Full Diagnosis there are two diagnostic bits per channel configured as shown in Figure 9.
Diagnosis bit 0 and bit 1 are always set to 1.
5.2.10 Transfer Delay Time
2)
(CS high time between two
accesses)
t
dt
200 – – ns – –
5.2.11 Data Valid Time
1)
C
L
= 50 pF to 100 pF
C
L
= 220 pF
t
valid
–
–
–
–
120
150
ns – –
1) Not subject to production test, specified by design.
2) To get the correct diagnostic information, the transfer delay time has to be extended to the maximum fault filter time
t
f(fault)max
= 200 µs.
Electrical Characteristics: SPI Timing (cont’d)
V
CC
= 4.5 V to 5.5 V, T
j
= -40 °C to +150 °C, V
B
= 6 V to 16 V, Reset = H, V
DO
= V
CC
, all voltages with respect to
ground, positive current flowing into pin (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Pin/
Comment
Conditions
Min. Typ. Max.
Diagnostic Serial Data Out SO
HH Normal function
HL Overload, Shorted Load or Overtemperature
LH Open Load
LL Switch Bypassed
Ch.6 Ch.5 Ch.4 Ch.3
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSB
Ch.2 Ch.1
LSB
Channel Overtem-
perature Flag
IC Overtem-
perature Flag
Bit0 and Bit1
is always 1