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RM0016 Datasheet(PDF) 27 Page - STMicroelectronics

Part # RM0016
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

RM0016 Datasheet(HTML) 27 Page - STMicroelectronics

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RM0016
Central processing unit (CPU)
28
1.2.2
STM8 CPU register map
The CPU registers are mapped in the STM8 address space as shown inTable 2. These
registers can only be accessed by the debug module but not by memory access instructions
executed in the core.
1.3
Global configuration register (CFG_GCR)
1.3.1
Activation level
The MCU activation level is configured by programming the AL bit in the CFG_GCR register.
For information on the use of this bit refer to Section 6.4: Activation level/low power mode
control on page 63.
1.3.2
SWIM disable
By default, after an MCU reset, the SWIM pin is configured to allow communication with an
external tool for debugging or Flash/EEPROM programming. This pin can be configured by
the application for use as a general purpose I/O. This is done by setting the SWD bit in the
CFG_GCR register.
Table 2. CPU register map
Address
offset
Register name
765432
1
0
0x00
A
MSB
-----
-
LSB
0x01
PCE
MSB
-
-
---
-
LSB
0x02
PCH
MSB
-----
-
LSB
0x03
PCL
MSB
-----
-
LSB
0x04
XH
MSB
-----
-
LSB
0x05
XL
MSB
-----
-
LSB
0x06
YH
MSB
-----
-
LSB
0x07
YL
MSB
-----
-
LSB
0x08
SPH
MSB
-----
-
LSB
0x09
SPL
MSB
-----
-
LSB
0x0A
CC
V
0
I1
H
I0
N
Z
C



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