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RM0312 데이터시트(PDF) 4 Page - STMicroelectronics

부품명 RM0312
상세설명  STM8TL5xxx microcontroller family
PDF  275 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0312 데이터시트(HTML) 4 Page - STMicroelectronics

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Contents
RM0312
4/275
DocID022352 Rev 3
6
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7
Reset (RST) and voltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1
“Reset state” and “under reset” definitions . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2
External reset (NRST pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.1
Asynchronous external reset description . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.2
Configuring NRST/PA5 pin as general purpose output . . . . . . . . . . . . . 58
7.3
Internal reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3.1
Power-on reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3.2
Independent watchdog reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3.3
SWIM reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3.4
Illegal opcode reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.4
RST registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.4.1
Reset pin configuration register (RST_CR) . . . . . . . . . . . . . . . . . . . . . . 59
7.4.2
Reset status register (RST_SR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.5
RST register map and reset values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8
Clock control (CLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
8.1
Master clock (HSI clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.1.1
Peripheral clock gating (PCG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.2
LSI clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.3
Configurable clock-output capability (CCO) . . . . . . . . . . . . . . . . . . . . . . . 63
8.4
CLK registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.4.1
Clock divider register (CLK_CKDIVR) . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.4.2
Peripheral clock gating register 1 (CLK_PCKENR1) . . . . . . . . . . . . . . . 64
8.4.3
Peripheral clock gating register 2 (CLK_PCKENR2) . . . . . . . . . . . . . . . 64
8.4.4
Configurable clock output register (CLK_CCOR) . . . . . . . . . . . . . . . . . 65
8.4.5
CLK register map and reset values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9
Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.1
General considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.2
Managing the clock for low consumption . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.2.1
Slowing the system clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.2.2
Peripheral clock gating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.3
Switching peripherals off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
9.4
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69



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