参数资料
型号: Q80C32-30SHXXX:RD
厂商: TEMIC SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 30 MHz, MICROCONTROLLER, CQFP44
文件页数: 46/83页
文件大小: 8336K
42
8021G–AVR–03/11
ATmega329P/3290P
9.11
Register Description
9.11.1
SMCR – Sleep Mode Control Register
The Sleep Mode Control Register contains control bits for power management.
Bits 3, 2, 1 – SM2:0: Sleep Mode Select Bits 2, 1, and 0
These bits select between the five available sleep modes as shown in Table 9-2.
Note:
1. Standby mode is only recommended for use with external crystals or resonators.
Bit 1 – SE: Sleep Enable
The SE bit must be written to logic one to make the MCU enter the sleep mode when the SLEEP
instruction is executed. To avoid the MCU entering the sleep mode unless it is the programmer’s
purpose, it is recommended to write the Sleep Enable (SE) bit to one just before the execution of
the SLEEP instruction and to clear it immediately after waking up.
9.11.2
MCUCR – MCU Control Register
Bit 6 – BODS: BOD Sleep
The BODS bit must be written to logic one in order to turn off BOD during sleep, see Table 9-1
on page 37. Writing to the BODS bit is controlled by a timed sequence and an enable bit,
BODSE in MCUCR. To disable BOD in relevant sleep modes, both BODS and BODSE must first
be set to one. Then, to set the BODS bit, BODS must be set to one and BODSE must be set to
zero within four clock cycles.
The BODS bit is active three clock cycles after it is set. A sleep instruction must be executed
while BODS is active in order to turn off the BOD for the actual sleep mode. The BODS bit is
automatically cleared after three clock cycles.
Bit
76543210
SM2
SM1
SM0
SE
SMCR
Read/Write
RRRR
R/W
Initial Value
00000000
Table 9-2.
Sleep Mode Select
SM2
SM1
SM0
Sleep Mode
000
Idle
0
1
ADC Noise Reduction
010
Power-down
011
Power-save
100
Reserved
101
Reserved
110
Standby(1)
111
Reserved
Bit
7
6
5
4
3
2
1
0
JTD
BODS
BODSE
PUD
IVSEL
IVCE
MCUCR
Read/Write
R/W
R
R/W
Initial Value
0
相关PDF资料
PDF描述
Q80C32-36:R 8-BIT, 36 MHz, MICROCONTROLLER, CQFP44
Q80C32-36SHXXX:R 8-BIT, 36 MHz, MICROCONTROLLER, CQFP44
Q80C32-42:D 8-BIT, 42 MHz, MICROCONTROLLER, CQFP44
Q80C32-42:R 8-BIT, 42 MHz, MICROCONTROLLER, CQFP44
Q80C32-42SHXXX:D 8-BIT, 42 MHz, MICROCONTROLLER, CQFP44
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