参数资料
型号: MC56F8033VLC
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP32
封装: ROHS COMPLIANT, PLASTIC, LQFP-32
文件页数: 142/157页
文件大小: 2117K
代理商: MC56F8033VLC
Register Descriptions
56F8033/56F8023 Data Sheet, Rev. 6
Freescale Semiconductor
85
peripherals clocks have the option to be clocked at 3X system clock rate, which has a maximum of 96MHz,
if the PLL output clock is selected as the system clock. If PLL is disabled, the 3X system clock will not be
available. This register is used to enable high-speed clocking for those peripherals that support it.
Note:
Operation is unpredictable if peripheral clocks are reconfigured at runtime, so peripherals should be
disabled before a peripheral clock is reconfigured.
Figure 6-9 Peripheral Clock Rate Register (SIM_PCR)
6.3.8.1
Reserved—Bit 15
This bit field is reserved. It must be set to 0.
6.3.8.2
Quad Timer A Clock Rate (TMRA_CR)—Bit 14
This bit selects the clock speed for the Quad Timer A module.
0 = Quad Timer A clock rate equals the system clock rate, to a maximum 32MHz (default)
1 = Quad Timer A clock rate equals 3X system clock rate, to a maximum 96MHz
6.3.8.3
Pulse Width Modulator Clock Rate (PWM_CR)—Bit 13
This bit selects the clock speed for the PWM module.
0 = PWM module clock rate equals the system clock rate, to a maximum 32MHz (default)
1 = PWM module clock rate equals 3X system clock rate, to a maximum 96MHz
6.3.8.4
Inter-Integrated Circuit Run Clock Rate (I2C_CR)—Bit 12
This bit selects the clock speed for the I2C run clock.
0 = I2C module run clock rate equals the system clock rate, to a maximum 32MHz (default)
1 = I2C module run clock rate equals 3X system clock rate, to a maximum 96MHz
6.3.8.5
Reserved—Bits 11–0
This bit field is reserved. Each bit must be set to 0.
6.3.9
Peripheral Clock Enable Register 0 (SIM_PCE0)
The Peripheral Clock Enable register enables or disables clocks to the peripherals as a power savings
feature. Significant power savings are achieved by enabling only the peripheral clocks that are in use.
When a peripheral’s clock is disabled, that peripheral is in Stop mode. Accesses made to a module that has
its clock disabled will have no effect. The corresponding peripheral should itself be disabled while its clock
is shut off. IPBus writes are not possible.
Base + $B
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
0
TMRA_
CR
PWM_
CR
I2C_
CR
0
Write
RESET
0
000
0
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