參數(shù)資料
型號: GMS87C7216LQ
廠商: Electronic Theatre Controls, Inc.
元件分類: 數(shù)學(xué)處理器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數(shù): 42/121頁
文件大小: 1645K
代理商: GMS87C7216LQ
GMS81C7208/7216
38
FEB. 2005 Ver 1.04
11. OPERATION MODE
The system clock controller starts or stops the main-frequency
clock oscillator. The operating mode is generally divided into the
main-clock mode, which is controlled by system clock mode reg-
ister (SCMR). Figure 11-1shows the operating mode transition
diagram.
System clock control is performed by the system clock mode reg-
ister, SCMR. During reset, this register is initialized to “0” so that
the main-clock operating mode is selected.
Main Clock Operating Mode
This mode is fast-frequency operating mode.
The CPU and the peripheral hardwares are operated on the high-
frequency clock. At reset release, this mode is invoked.
SLEEP Mode
In this mode, the CPU clock stops while peripherals and the os-
cillation source continue to operate normally.
STOP Mode
In this mode, the system operations are all stopped, holding the
internal states valid immediately before the stop at the low power
consumption level.
Figure 11-1 Operating Mode
Main-clock
Mode
STOP
Mode
RESET
Operation
Rese
Rese
Main: According to SCMR
Main: Stopped
Main: Oscillating
SLEEP
Mode
R
R
SO ntuto
Rfront1
Isuto
Rfront2
Main - Oscillating
NOTE1:
RESET
Watch Timer Int.
Timer interrupt (EC0, EC2)
External Int.
SIO Int.
Watchdog Timer Int.
NOTE2:
RESET
All Int.
CPU stops,
Peripherals are operate.
CPU and Peripherals are stops,
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