Figure 13. Idd Measurement / Mfx (Multi Function Expander) - STMicroelectronics STM32L476 User Manual

Figure 13. IDD measurement / MFX (Multi Function eXpander)

L2
3V_MFX
Ferrite
1uF_POL_10%_TANA C34
PC13
MFX_IRQ_OUT
MFX_IRQ_OUT
NRST D5 BAT60JFILM
NRST
R35
3V_MFX
[NA] 510_1%_0402
C32 R28
[NA]
PA4 MFX_WAKEUP
MFX_WAKEUP
MFX_SWDIO
R34 MFX_SWCLK
100K_1%_0402
MFX_I2C_SCL
MFX_I2C_SDA
R29
10K_1%_0402
MFX_USART3_TX
MFX_USART3_TX
MFX_USART3_RX
MFX_USART3_RX
PB10
MFX_I2C_SCL
MFX_I2C_SCL
PB11
MFX_I2C_SDA
MFX_I2C_SDA
CAL
3V_MFX R37
100K_1%_0402
T5
G STT7P2UH7
see note *
S D
T3 CAL_D
STT7P2UH7
see note * 4 4 T7
STT7P2UH7
see note *
SH0 3 1 SH1 3 1
2 2
5 5
R36 R38
6 6
SH0_D SH1_D
100K_1%_0402 100K_1%_0402
R39 R43
1_1%_0805 24_1%_0805
Current
direction
bypass
to MCU
JP5
VDD_MCU
3V
R30
0_5%_0603
C33
3V_MFX
100nF_X7R_10%_0402
U8
18 MFX_V2
GPIO0 GPIO0
25 19
SPARE SPAR A A E R R GPIO1 GPIO1
20
GPIO2 GPIO2
10 39
TSC_XP/GPO0 TSC_XP/GPO0 GPIO3 GPIO3
11 40
TSC_XN TSC_XN/GPO1 X X /G N N PO1 GPIO4 GPIO4
12 15
TSC_YP/GPO2 TSC_YP/GPO2 GPIO5 GPIO5
13 16
TSC_YN/GPO3 TSC_YN Y Y /G N N PO3 GPIO6 GPIO6
17
GPIO7 GPIO7
44 29
BOOT0 BOOT0 GPIO8 GPIO8
46 30
IRQOUT IRQOUT GPIO9 GPIO9
7 31
NRST NRST GPIO10 GPIO10
2 32
WA WAKEUP W W K A A EU K K P GPIO11 GPIO11
MFX_V2
34 33
SWDIO SWDIO GPIO12 GPIO12
37 26
SWCLK SWCLK GPIO13 GPIO13
27
GPIO14 GPIO14
42 28
I2C_SCL I2C_SCL GPIO15 GPIO15
43
I2C_SDA I2C_SDA
45 4 SH0
I2C_ADDR I2C_ADDR IDD_SH0 IDD_SH0
5 SH1
IDD_SH1/GPO5 IDD_SH1/GPO5
21 6 SH2
USART_TX USAR A A T_TX IDD_SH2/GPO6 IDD_SH2/GPO6
22 38
USART_RX USAR A A T_RX R R IDD_SH3/GPO7 IDD_SH3/GPO7
3 CAL
IDD_CAL/GPO4 IDD_CAL/GPO4
14 IDD_MEAS
IDD_MEAS IDD_MEAS
41
IDD_VDD_MCU IDD_VDD_MCU
R27
0_5%_0402
100nF_X7R_10%_0402
3V3
decoupling capacitors C36
close to TSZ122
100nF_X7R_10%_0402
3
4 T9 2
STT7P2UH7
see note *
SH2 3 1
2
5
R94
6
SH2_D
100K_1%_0402
R44 R41
620_1%_0805 10K_1%_0805
5
Shunts 6
LAYOUT PROPOSAL DRAWING
CN5 3V_MFX
1
MFX_SWCLK
2
3V3
VDD_MCU 3
MFX_SWDIO
4
3V_MFX
SB27
decoupling capacitors
close to TSZ122
SB26
R48 C39
300K_1%_0402 100nF_X7R_10%_0402
U11A
3 TSZ122IST
C38 1
V+
R49 2
V-
15K_1%_0402
U10A
TSZ122IST
R40 R42
1
V+
6K04_1%_0402 300K_1%_0402
V-
U11B
5 TSZ122IST
R51
7
IDD_MEAS
differential 6
100_1%_0402
amplifier
C40
R50
1uF_X5R_10%_0603
300K_1%_0402
U10B
TSZ122IST
R47
7 C37
100nF_X7R_10%_0402
6K04_1%_0402
Title:
Project:
Size:
Date:
Note *: two footprints superimposed allows to
also populate with SO-8 package.
(STS9P2UH7 P MOS transistors)
3V_MFX
T2 1
2
STS9P2UH7
3
SH0 4 5
6
7
8 SH0_D
3V_MFX
T4 1
2
STS9P2UH7
3
CAL 4 5
6
7
8 CAL_D
T6 1 CAL_D
2
STS9P2UH7
3
SH1 4 5
6
7
8 SH1_D
T8 1 CAL_D
2
STS9P2UH7
3
SH2 4 5
6
7
8 SH2_D
one capacitor close to each MFX pins:
VDD, VDD 1, VDD 2, VDD 3
3V_MFX
C26
100nF_X7R_10%_0402
C30
100nF_X7R_10%_0402
C31
100nF_X7R_10%_0402
C28
100nF_X7R_10%_0402
IDD measurement / MFX (Multi Function eXpander)
STM32L476G-DISCO
A4 Reference: MB1184 Revision: C-01
6/15/2015 Sheet: 4 of 10