Freescale Semiconductor MPC5748G EVB, Руководство пользователя, Страница: 54 / 88

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Individual MCU
supply control
jumpers 3v3
Default Configuraiton:
- ALL MCU supply voltages are set to 3.3V (ADC0, ADC1, VDD_HV_A,
VDD_HV_B, VDD_HV_C, VBallast)
- VDD_HV_FLA = External 3.3V supplied (jumper fitted)
- VDD_LV Supplied from ballast transistor
This is not necessarily the same as the default shown in the RM. All
VDD_HV_x domains have at least one peripheral that only functions at
3.3V. Therefore the default is to run these from 3.3V. The analogue pins
can only be driven to the same voltage as the VDD_HV_x domain they are
situated in (ie max 3.3V) so makes sense for the analogue supply and
reference to be 3.3V
Ground Links
(0 Ohm
Resistors)
DAC External
Ref Voltage
Select 3v3 5v0 5v0 5v0 5v0 5v0 3v3 3v3 3v3
3v3
3v3 5v0
(Current Limit Resistor to
protecxt against case when
other MCU supplies are
disconnected and external
reference supply is live)
MPC5748G MCU Power Connections
Caution:
- If VDD_HV_A is driven from 5V, the VDD_HV_FLA pin
must not be supplied from 3.3V (remove the HVA_FLA
jumper)
- Don't attempt to over drive an analogue pad to 5V
when the digital VDD_HV_x supply is set to 3.3V. This
will trigger the ESD protectrion on that pad. For
example if VDD_HV_A is set to 3.3V and the analogue
supplies are set to 5V, you cannot drive 5V into a
pad in the VDD_HV_A domain
From MCU
supply
jumpers on
main board
MCU_3V3_S
MCU_5V0_S
MCU_1V25_L
MCU_3V3_L
MCU_5V0_L
H
VB_C
A
P
HV
C_
CA
P
HV
FL
A
_
CA
P
LV_C
AP
AD
C
0_C
AP
AD
C
1_C
AP
A
DC1
RE
F_
CA
P
ADC0_GND ADC1_GND GND
H
VA_C
A
P
GND ADC0_GND GND ADC1_GND
E_C
A
P
B_C
A
P
L
V
DE
C_
CA
P
H
VA_C
A
P
GND GND
MCU_1V25_L 8
MCU_5V0_S 8
MCU_3V3_S 8
MCU_5V0_L 8
MCU_3V3_L 8
Drawing Title:
Size Document Number Rev
Date: Sheet of
Page Title:
Automotive Microcontroller
Applications
East Kilbride, Scotland
SCH-27900 PDF: SPF-27900 A1
MPC5748G 324 BGA Daughter Card
B
Tuesday, August 18, 2015
MPC5748G MCU Power
2 8
Freescale General Business Use
Drawing Title:
Size Document Number Rev
Date: Sheet of
Page Title:
Automotive Microcontroller
Applications
East Kilbride, Scotland
SCH-27900 PDF: SPF-27900 A1
MPC5748G 324 BGA Daughter Card
B
Tuesday, August 18, 2015
MPC5748G MCU Power
2 8
Freescale General Business Use
Drawing Title:
Size Document Number Rev
Date: Sheet of
Page Title:
Automotive Microcontroller
Applications
East Kilbride, Scotland
SCH-27900 PDF: SPF-27900 A1
MPC5748G 324 BGA Daughter Card
B
Tuesday, August 18, 2015
MPC5748G MCU Power
2 8
Freescale General Business Use
J11
1
2
3
Q20
MJD31CT4
3
4
1
J3
1
2
3
J10
1
2
3
R10
0
J7
1
2
3
TPH2
1
J5
1
2
3
TPH3
1
TPH1
1
J6
1
2
3
J4
1
2
3
R36
1.0K
1.25v Core & External Ballast Analogue
MPC5748G 6M 324BGA
Package 2of3 Power Pins
Flash
DAC Ref
U1B
MP OTB-324R-1.0-019-00
V
RC_
CTRL
K2
VSS_LV_F
6
F6
VSS_LV_J
7
J7
VSS_LV_J
8
J8
VSS_LV_J
9
J9
VSS_LV_K7
K7
VSS_LV_K8
K8
VSS_LV_K9
K9
VSS_LV_K10
K10
VSS_LV_L7
L7
VSS_LV_L8
L8
VSS_LV_L9
L9
VSS_LV_L10
L10
VSS_LV_M
7
M7
VSS_LV_M
8
M8
VSS_LV_M
9
M9
VSS_LV_M
10
M1
0
VD
D
_LV_D
8
D8
VD
D
_LV_F
5
F5
VD
D
_LV_K3
K3
VD
D
_LV_K11
K11
VD
D
_LV_K12
K12
VD
D
_LV_L11
L11
VD
D
_LV_L12
L12
VD
D
_LV_M
11
M1
1
VD
D
_LV_M
12
M1
2
V
DD_
HV
_
A
_
C
2
C2
V
DD_
HV
_
A
_
C
9
C9
V
DD_
HV
_
A
_
R
7
R7
VD
D
_
H
V
_A_E18
E18
VD
D
_
H
V
_A_K17
K17
V
DD_
HV
_
A
_
U
8
U8
VD
D
_
H
V
_B_J
15
J1
5
VD
D
_
H
V
_B_K13
K13
V
DD_
HV
_
C
L14
VSS_H
V
_AD
C
0
U1
4
V
DD_
HV
_
A
DC0
V14
V
DD_
HV
_
A
DC1
V16
VSS_H
V
_AD
C
1
V17
V
DD_
HV
_
F
L
A
J2
V
DD_
HV
_
A
DC1
_
R
E
F
V15
VSS_H
V
_H
7
H7
VSS_H
V
_H
8
H8
VSS_H
V
_H
9
H9
VSS_H
V
_H
10
H1
0
VSS_H
V
_H
11
H1
1
VSS_H
V
_H
12
H1
2
VSS_H
V
_J
10
J1
0
VSS_H
V
_J
11
J1
1
VSS_H
V
_J
12
J1
2
VSS_H
V
_K14
K14
VSS_H
V
_K16
K16
VSS_H
V
_V8
V8
VI
N
1_C
M
P
_R
EF
J3
VD
D
_LP_D
EC
L2
VSS_H
V
_VPP
K1
R9
0
R7 0
J8
1
2
R35
0
J9
1
2
3
R24
0