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ABOV Semiconductor
System Control Unit - SCU
SMR
System Mode Register
1.5.1
The previous operating mode is shown in this register. The previous operating mode will be saved in this register after
reset event. There are two controllable bits in power down mode. One is LSI On/Off control and the other is VDC On/Off
control in power down mode.
System Mode Register is 16-bit register.
SMR=0x4000_0004
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LS
IA
O
N
V
D
C
A
O
N
P
R
EV
M
O
D
E
0
0
0
0
0
0
0
0
0
0
00
0
0
0
0
RW
RW
RO
9
LSIAON
LSI Always on select bit in power down mode
0
LSI is automatically off entering power down mode
1
LSI isn’t automatically off entering power down mode
8
VDCAON
VDC Always on select bit in power down mode
0
VDC is automatically off entering power down mode
1
VDC isn’t automatically off entering power down mode
5
4
PREVMODE
Previous operating mode before current reset event
00
Previous operating mode was RUN mode
01
Previous operating mode was SLEEP mode
10
Previous operating mode was Power Down mode
11
Previous operating mode was INIT mode
SRCR
System Reset Control Register
1.5.2
It is possible to check if chip is in power down mode. To use STBO output function, it should be set as STBO that has
output mode in Pin Mux. And It is possible to reset MCU as SWRST bit set.
System reset control register is 8-bit register.
SCR=0x4000_0008
7
6
5
4
3
2
1
0
STBOP
SWRST
0
0
0
0
0
0
0
0
RW
RW
5
STBOP
STBO pin output polarity select bit
0
Output Low when chip is in Power Down
Output High when chip is in normal
1
Output High when chip is in Power Down
Output Low when chip is in normal
1
SWRST
Internal soft reset activation bit (check RSER[4] for reset)
0
Normal operation
1
Internal soft reset generated and auto cleared
Summary of Contents for AC30M1x32
Page 3: ...3 246 ABOV Semiconductor INTRODUCTION SECTION 1 INTRODUCTION ...
Page 4: ...4 246 4 246 AC30M1x64 1x32 ABOV Semiconductor OVERVIEW CHAPTER 1 ...
Page 18: ...18 246 18 246 ABOV Semiconductor AC30M1x64 1x32 CPU CHAPTER 2 ...
Page 22: ...22 246 22 246 ABOV Semiconductor AC30M1x64 1x32 Boot Mode CHAPTER 3 ...
Page 26: ...26 246 26 246 ABOV Semiconductor AC30M1x64 1x32 SECTION 2 PERIPHERALS ...
Page 27: ...27 246 ABOV Semiconductor System Control Unit SCU SYSTEM CONTROL UNIT SCU CHAPTER 1 ...
Page 69: ...69 246 ABOV Semiconductor Port Control Unit PCU PORT CONTROL UNIT PCU CHAPTER 2 ...
Page 85: ...85 246 ABOV Semiconductor General Purpose I O GPIO GENERAL PURPOSE I O GPIO CHAPTER 3 ...
Page 92: ...92 246 92 246 AC30M1x64 1x32 ABOV Semiconductor FLASH MEMORY CONTROLLER CHAPTER 4 ...
Page 105: ...105 246 ABOV Semiconductor Internal SRAM INTERNAL SRAM CHAPTER 5 ...
Page 107: ...107 246 ABOV Semiconductor Watch Dog Timer WATCH DOG TIMER WDT CHAPTER 6 ...
Page 113: ...113 246 ABOV Semiconductor 16 bit Timer 16 BIT TIMER CHAPTER 7 ...
Page 129: ...129 246 ABOV Semiconductor FRT FREE RUN TIMER FRT CHAPTER 8 ...
Page 134: ...134 246 134 246 ABOV Semiconductor AC30M1x64 1x32 FUNCTION DESCRIPTION 8 3 ...
Page 135: ...135 246 UART ABOV Semiconductor UNIVERSAL ASYNCHRONOUS CHAPTER 9 RECEIVER TRANSMITTER UART ...
Page 151: ...151 246 ABOV Semiconductor UART Figure 9 6 Transmit interrupt timing diagram ...
Page 152: ...152 246 152 246 ABOV Semiconductor AC30M1x64 1x32 SERIAL PERIPHERAL INTERFACE SPI CHAPTER 10 ...
Page 164: ...164 246 164 246 ABOV Semiconductor AC30M1x64 1x32 I2 C Interface CHAPTER 11 ...
Page 185: ...185 246 ABOV Semiconductor Motor PWM MOTOR PULSE WIDTH MODULATOR CHAPTER 12 MPWM ...
Page 215: ...215 246 ABOV Semiconductor Divider DIVIDER DIV64 CHAPTER 13 ...
Page 221: ...221 246 ABOV Semiconductor 12 BIT A D Converter 12BIT A D CONVERTER CHAPTER 14 ...
Page 235: ...235 246 ABOV Semiconductor CHARACTERISTIC SECTION 3 CHARACTERISTIC ...
Page 236: ...236 246 236 246 ABOV Semiconductor AC30M1x64 1x32 Electrical Characteristic CHAPTER 1 ...
Page 243: ...243 246 ABOV Semiconductor Package Package CHAPTER 2 ...