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STM8S Datasheet(PDF) 28 Page - STMicroelectronics

Part # STM8S
Description  STM8S Series and STM8AF Series 8-bit microcontrollers
PDF  467 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM8S Datasheet(HTML) 28 Page - STMicroelectronics

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Central processing unit (CPU)
RM0016
28/467
DocID14587 Rev 14
1.3.3
Description of global configuration register (CFG_GCR)
Address offset: 0x00
Reset value: 0x00
1.3.4
Global configuration register map and reset values
The CFG_GCR is mapped in the STM8 address space. Refer to the corresponding
datasheets for the base address.
7
654
3210
Reserved
AL
SWD
rw
rw
Bits 7:2 Reserved
Bit 1 AL: Activation level
This bit is set and cleared by software. It configures main or interrupt-only activation.
0: Main activation level. An IRET instruction causes the context to be retrieved from the stack and
the main program continues after the WFI instruction.
1: Interrupt-only activation level. An IRET instruction causes the CPU to go back to WFI/Halt mode
without restoring the context.
Bit 0 SWD: SWIM disable
0: SWIM mode enabled
1: SWIM mode disabled
When SWIM mode is enabled, the SWIM pin cannot be used as general purpose I/O.
Table 3. CFG_GCR register map
Address
offset
Register name
765432
1
0
0x00
CFG_GCR
Reset value
-
0
-
0
-
0
-
0
-
0
-
0
AL
0
SWD
0



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