STMicroelectronics 32L4R9IDISCOVERY, User Manual

Page: 63 / 78

UM
227
1
Schematics
DocID030
906 Re
v 2
63
/78
Figure 28. 32L4R9IDISCOVERY IDD measurement and Multi Function eXpander
9 14
IDD measurement / MFX (Multi Function eXpander)
MB1311 C
28/08/2017
Title:
Size: Reference:
Date: Sheet: of
A3 Revision:
STM32L4R9I-DISCO Project:
VDD_MCU
Current
direction
to MCU
differential
amplifier
SH0 SH1 SH2
Shunts
3
4
5
G
S
D
6
2
1
T2
STT7P2UH7
3
4
5
G
S
D
6
2
1
T8
STT7P2UH7
3
4
5
G
S
D
6
2
1
T10
STT7P2UH7
3
4 5
G
S D
6 2 1
T7
STT7P2UH7
decoupling capacitors
close to TSZ122
MFX_IRQ_OUT
IDD_MEAS
MFX_SWCLK
CAL
SH2
SH1
MFX_SWDIO
IDD_MEAS
SH1_D SH2_D SH0_D
CAL_D
VDD1 one capacitor close to each MFX pins:
VDD, VDD_1, VDD_2, VDD_3
SH0
VDD_MCU
MFX_WAKEUP
L6
FCM1608KF-601T03
1
2
3
JP1
bypass
R55
1_1%_0805 R81
24_1%_0805 R85
620_1%_0805 R62
10K_1%_0805
V+
V-
3
2
1
4
8
U27A
TSZ122IST
5
6
7
U27B
TSZ122IST
V+
V-
3
2
1
4
8
U25A
TSZ122IST
5
6
7
U25B
TSZ122IST
decoupling capacitors
close to TSZ122
MFX_I2C1_SCL
MFX_I2C1_SDA
MFX_WAKEUP
MFX_IRQ_OUT
NRST
NRST
MFX_I2C1_SCL
MFX_I2C1_SDA
VDD1
VDD1
D3 BAT60JFILM
SDA
SCL
I2C
MFX_I2C
VDD
VDD
3
4 5
G
S D
6 2 1
T3
STT7P2UH7
VDD
+5V
+5V
PI1
PB2
PG13
PB6
MFX_aGPIO1
CAL
MFX_aGPIO1
MFX_aGPIO1
T50_4 T50_6
AMP_VDD
AMP_5V
1 2 3 4
CN14
[N/A]
MFX_SWCLK MFX_SWDIO
VDD1
3
4
5
G
SD
6
2
1
T9
STT7P2UH7
3
4
5
G
SD
6
2
1
T11
STT7P2UH7
100nF
C84
100nF
C88
100nF
C83
100nF
C89
100nF
C90
100K
R87
10K R96
510 R95
0
R79
100K
R74
100K
R49
100K
R84
100K
R89
100K
R90
100nF
C69
100nF
C64
100nF
C73
100nF
C78
1uF
C67
100
R75
357K
R77
11K
R70
6K04 R60
6K04 R65 300K R66
300K R76
Default I2C Address:1000010
MFX_V3
WAKEUP
2
NRST
7
TSC_XP/GPO0
10
TSC_XN/GPO1
11
TSC_YP/GPO2
12
TSC_YN/GPO3
13
USART_TX
21
USART_RX
22
SPARE
14
SWDIO
34
SWCLK
37
I2C_SCL
42
I2C_SDA
43
BOOT0
44
I2C_ADDR
45
IRQOUT
46
IDD_CAL/GPO4
3
IDD_SH0
4
IDD_SH1/GPO5
5
IDD_SH2/GPO6
6
IDD_MEAS
25
GPIO0
18
GPIO1
19
GPIO2
20
GPIO3
39
GPIO4
40
GPIO5
15
GPIO6
16
GPIO7
17
GPIO8
29
GPIO9
30
GPIO10
31
GPIO11
32
GPIO12
33
GPIO13
26
IDD_SH3/GPO7
38
GPIO14
27
GPIO15
28
IDD_VDD_MCU
41
VD
D
1
VD
DA
9
VD
D_
1
24
VD
D_
2
36
VD
D_
3
48
VS
S
A
8
VS
S
_
1
23
VS
S
_
2
35
VS
S
_
3
47
U29
0
R97
VDD1
JP6 [N/A]
SB31
DSI_TOUCH_INT
JOY_UP
JOY_DOWN
JOY_RIGHT
JOY_LEFT
JOYSTICK
JOYSTICK
DSI_RESET
DCMI_PWR_EN
uSD_Detect
USB_OVER
JOY_DOWN
JOY_RIGHT
JOY_LEFT
JOY_UP
LED_ORANGE
USB_OTGFS_PPWR_EN
AUDIO_RST
EXT_RESET
10nF
C86
[N/A]
STMOD+_SEL_0
STMOD+_SEL_1
DSI_1V8_PWRON
DSI_PWR_ON
DSI_1V8_PWRON
DSI_3V3_PWRON
6.8K R117
56K R116 DSI_PWR_ON PA8 (MFX_GPIO8)
PA2 (MFX_aGPIO2)
22uF
C75