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COP8SGK640N6

COP8SGK640N6首页预览图
型号: COP8SGK640N6
PDF文件:
  • COP8SGK640N6 PDF文件
  • COP8SGK640N6 PDF在线浏览
功能描述: 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART
PDF文件大小: 913.32 Kbytes
PDF页数: 共62页
制造商: NSC[National Semiconductor]
制造商LOGO: NSC[National Semiconductor] LOGO
制造商网址: http://www.national.com
捡单宝COP8SGK640N6
PDF页面索引
120%
7.0 Power Saving Features (Continued)
7.2 IDLE MODE
The device is placed in the IDLE mode by writing a “1” to the
IDLE flag (G6 data bit). In this mode, all activities, except the
associated on-board oscillator circuitry and the IDLE Timer
T0, are stopped.
As with the HALT mode, the device can be returned to
normal operation with a reset, or with a Multi-Input Wakeup
from the L Port. Alternately, the microcontroller resumes
normal operation from the IDLE mode when the twelfth bit
(representing 4.096 ms at internal clock frequency of
10 MHz, t
C
= 1 µs) of the IDLE Timer toggles.
This toggle condition of the twelfth bit of the IDLE Timer T0 is
latched into the T0PND pending flag.
The user has the option of being interrupted with a transition
on the twelfth bit of the IDLE Timer T0. The interrupt can be
enabled or disabled via the T0EN control bit. Setting the
T0EN flag enables the interrupt and vice versa.
The user can enter the IDLE mode with the Timer T0 inter-
rupt enabled. In this case, when the T0PND bit gets set, the
device will first execute the Timer T0 interrupt service routine
and then return to the instruction following the “Enter Idle
Mode” instruction.
Alternatively, the user can enter the IDLE mode with the
IDLE Timer T0 interrupt disabled. In this case, the device will
resume normal operation with the instruction immediately
following the “Enter IDLE Mode” instruction.
Note: It is necessary to program two NOP instructions following both the set
HALT mode and set IDLE mode instructions. These NOP instructions
are necessary to allow clock resynchronization following the HALT or
IDLE modes.
10131725
FIGURE 18. Wakeup from HALT
10131726
FIGURE 19. Wakeup from IDLE
COP8SG Family
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