ET
AS
Te
ch
nic
al D
ata
XE
TK
-S
21
.0
B
-
Us
er
G
uid
e
41
7.9
Electrical Characteristics
7.9.1
ECU Interface Characteristics
Parameter
Symbol
Condition
1)
Min
Typ
Max
Unit
CalWakeup Output Voltage
CALWAKEUP
U
Batt
= 6
-
18
V;
load 0
-
50
mA
U
Batt
-
1
V
U
Batt
V
ECU Power Supply Supervision
Voltage (3.3
V selected)
VDDP
VDDP
2.48
2.58
2.68
V
VDDP
2.33
2.43
2.53
V
I
VDDP
VDDP
=
3.3
V
200
µA
ECU Power Supply Supervision
Voltage (5.0
V selected)
VDDP
VDDP
2.98
3.08
3.18
V
VDDP
2.83
2.93
3.03
V
I
VDDP
VDDP
=
5.0
V
300
µA
ECU Standby RAM Supervision
Voltage (1.25
V selected)
VDDSBRAM / VDDS
-
BRAM_SENSE
VDDSBRAM
1.00
1.10
1.20
V
VDDSBRAM
1.02
1.12
1.22
V
I
VDDSBRAM
VDDSBRAM
=
1.25
V
73
µA
ECU Standby RAM Output Voltage(1.25V)
2)
VDDSBRAM
max. 600
mA load
1.19
1.25
1.33
V
1)
: VDDP
ECU Power Supply off
ECU Power Supply on
VDDP
ECU Power Supply on
ECU Power Supply off
VDDSBRAM
ECU Standby RAM Power off
ECU Standby RAM Power on
VDDSBRAM
ECU Standby RAM Power on
ECU Standby RAM Power off
2)
: Current drawn from XETK VDDSBRAM supply must not exceed 600
mA
