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參數(shù)資料
| 型號： | MC56F8323VFBE |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 139/140頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU HYBRID DSP 32K 64-LQFP |
| 標(biāo)準(zhǔn)包裝： | 160 |
| 系列： | 56F8xxx |
| 核心處理器： | 56800E |
| 芯體尺寸： | 16-位 |
| 速度： | 60MHz |
| 連通性： | CAN，SCI，SPI |
| 外圍設(shè)備： | POR，PWM，溫度傳感器，WDT |
| 輸入/輸出數(shù)： | 27 |
| 程序存儲器容量： | 32KB（16K x 16） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 12K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.25 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x12b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 105°C |
| 封裝/外殼： | 64-LQFP |
| 包裝： | 托盤 |
| 配用： | MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
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56F8323 Technical Data, Rev. 17
98
Freescale Semiconductor
Preliminary
6.8 Stop and Wait Mode Disable Function
Figure 6-16 Internal Stop Disable Circuit
The 56800E core contains both STOP and WAIT instructions. Both put the CPU to sleep. For lowest
power consumption in Stop mode, the PLL can be shut down. This must be done explicitly before entering
Stop mode, since there is no automatic mechanism for this. When the PLL is shut down, the 56800E
system clock must be set equal to the prescaler output.
Some applications require the 56800E STOP and WAIT instructions be disabled. To disable those
instructions, write to the SIM control register (SIM_CONTROL) described in Part 6.5.1. This procedure
can be on either a permanent or temporary basis. Permanently assigned applications last only until their
next reset.
6.9 Resets
The SIM supports four sources of reset. The two asynchronous sources are the external RESET pin and
the Power-On Reset (POR). The two synchronous sources are the software reset, which is generated within
the SIM itself, by writing to the SIM_CONTROL register, and the COP reset.
Reset begins with the assertion of any of the reset sources. Release of reset to various blocks is sequenced
to permit proper operation of the device. A POR reset is declared when reset is removed and any of the
three voltage detectors (1.8V POR, 2.2V core voltage, or 2.7V I/O voltage) indicate a low supply voltage
condition. POR will continue to be asserted until all voltage detectors indicate a stable supply is available
(note that as power is removed POR is not declared until the 1.8V core voltage threshold is reached.) A
POR reset is then extended for 64 clock cycles to permit stabilization of the clock source, followed by a
32 clock window in which SIM clocking is initiated. It is then followed by a 32 clock window in which
peripherals are released to implement Flash security, and, finally, followed by a 32 clock window in which
the core is initialized. After completion of the described reset sequence, application code will begin
execution.
Resets may be asserted asynchronously, but are always released internally on a rising edge of the system
clock.
D-FLOP
DQ
C
D-FLOP
D
Q
C
R
56800E
STOP_DIS
Permanent
Disable
Reprogrammable
Disable
Clock
Select
Reset
D
Note: Wait disable
circuit is similar
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