RM0029 Datasheet, PDF (515/1740 Pages) STMicroelectronics – The primary objective of this document

RM0029
System Integration Unit (SIU)
2. When configured as ETPU, the IBE bit may be set to one to reflect the pin state in the corresponding GPDI register. Setting
the IBE bit to zero reduces power consumption. The IBE bit must be set to one for both EMIOS[3] and GPIO[182] when
configured as inputs.
3. The weak pull up/down selection at reset for the EMIOS[3] pin is determined by the WKPCFG pin.
Figure 277. Pad Configuration Register (SIU_PCR182)
Table 256. SIU_PCR182 PA values
Signal
Name
Module
Description
I/O^(1),(2)
PA value
Primary
ALT1
GPIO
EMIOS[3]
ETPU_A[3]
GPIO[182]
eMIOS
eTPU
SIU
eMIOS channel I/O
eTPU channel O
GPIO
I/O
0b01
0b10
0b00
1. In cases where an I/O function can be either an input or an output, I/O direction is specified using the IBE and OBE bits. Set
IBE = 1 for input or OBE = 1 for output.
2. For I/O functions that change direction dynamically, such as the external data bus, switching between input and output is
handled internally and the IBE and OBE bits are ignored.
Pad Configuration Register 183 (SIU_PCR183)
SIU_BASE+0x1AE
0
1
2
R₀
0
0
W
Reset ₀
0
0
3
4
5
6
7
8
(2)
PA
OBE IBE
0
(1)
0
0
0
0
0
0
9
10 11
12 13 14 15
0 ODE HYS
SRC
WPE WPS
(3)
0
0
0
0
0
1 WKP
= Unimplemented or Reserved
1. The OBE bit must be set to one for both EMIOS[4] and GPIO[183] when configured as outputs.
2. When configured as ETPU, the IBE bit may be set to one to reflect the pin state in the corresponding GPDI register. Setting
the IBE bit to zero reduces power consumption. The IBE bit must be set to one for both EMIOS[4] and GPIO[183] when
configured as inputs.
3. The weak pull up/down selection at reset for the EMIOS[4] pin is determined by the WKPCFG pin.
Figure 278. Pad Configuration Register (SIU_PCR183)
Table 257. SIU_PCR183 PA values
Signal
Name
Module
Description
I/O^(1),(2)
PA value
Primary
ALT1
ALT2
GPIO
EMIOS[4]
ETPU_A[4]
RCH2_C
GPIO[183]
eMIOS
eTPU
Reaction
SIU
eMIOS channel I/O
eTPU channel O
Reaction channel O
GPIO
I/O
0b001
0b010
0b100
0b000
1. In cases where an I/O function can be either an input or an output, I/O direction is specified using the IBE and OBE bits. Set
IBE = 1 for input or OBE = 1 for output.
2. For I/O functions that change direction dynamically, such as the external data bus, switching between input and output is
handled internally and the IBE and OBE bits are ignored.
Doc ID 15177 Rev 8
515/1740