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RM0312 Datasheet(PDF) 82 Page - STMicroelectronics

Part # RM0312
Description  STM8TL5xxx microcontroller family
PDF  275 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0312 Datasheet(HTML) 82 Page - STMicroelectronics

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General purpose I/O ports (GPIO)
RM0312
82/275
DocID022352 Rev 3
10.9.5
Port x control register 2 (Px_CR2)
Address offset: 0x04
Reset value: 0x00
10.9.6
GPIO register map and reset values
Each GPIO port has five registers mapped as shown in Table 21. Refer to the register map
in the corresponding datasheet for the base address for each port.
Note:
At reset state, all ports are input floating. Exceptions are indicated in the pin description
table of the corresponding datasheet.
7
654
3210
C27
C26
C25
C24
C23
C22
C21
C20
rw
rw
rw
rw
rw
rw
rw
rw
Bits 7:0 C2[7:0]: Control bits
These bits are set and cleared by software. They select different functions in input mode and output
mode. In input mode, the CR2 bit enables the interrupt capability if available. If the I/O does not have
interrupt capability, setting the CR2 bit has no effect. In output mode, setting the bit increases the
speed of the I/O. This applies to ports with O3 and O4 output types (see pin description table).
– In input mode (DDR = 0):
0: External interrupt disabled
1: External interrupt enabled
– In output mode (DDR = 1):
0: Output speed up to 2 MHz
1: Output speed up to 10 MHz
Table 21. GPIO register map
Address
offset
Register
name
7654321
0
0x00
Px_ODR
Reset value
ODR7
0
ODR6
0
ODR5
0
ODR4
0
ODR3
0
ODR2
0
ODR1
0
ODR0
0
0x01
Px_IDR
Reset value
IDR7
x
IDR6
x
IDR5
x
IDR4
x
IDR3
x
IDR2
x
IDR1
x
IDR0
x
0x02
Px_DDR
Reset value
DDR7
0
DDR6
0
DDR5
0
DDR4
0
DDR3
0
DDR2
0
DDR1
0
DDR0
0
0x03
Px_CR1
Reset value
C17
0
C16
0
C15
0
C14
0
C13
0
C12
0
C11
0
C10
0
0x04
Px_CR2
Reset value
C27
0
C26
0
C25
0
C24
0
C23
0
C22
0
C21
0
C20
0



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