参数资料
型号: MC56F8355VFG60
厂商: MOTOROLA INC
元件分类: 数字信号处理
英文描述: 4-BIT, 120 MHz, OTHER DSP, PQFP128
封装: LQFP-128
文件页数: 5/152页
文件大小: 2224K
代理商: MC56F8355VFG60
102
56F8355 Technical Data
Preliminary
6.5.6.11
CTRL—Bit 5
This bit controls the pull-up resistors on the WR and RD pins.
6.5.6.12
Reserved—Bit 4
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
6.5.6.13
JTAG—Bit 3
This bit controls the pull-up resistors on the TRST, TMS and TDI pins.
6.5.6.14
Reserved—Bit 2–0
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
6.5.7
CLKO Select Register (SIM_CLKOSR)
The CLKO select register can be used to multiplex out any one of the clocks generated inside the
clock generation and SIM modules. The default value is SYS_CLK. This path has been optimized
in order to minimize any delay and clock duty cycle distortion. All other clocks primarily muxed
out are for test purposes only, and are subject to significant phase shift at high frequencies.
The upper four bits of the GPIO B register can function as GPIO A23 through A20, or as additional
clock output signals. GPIO has priority and is enabled/disabled via the GPIOB_PER. If GPIO
B[7:4] are programmed to operate as peripheral outputs, then the choice between A23 through A20
and additional clock outputs is done here in the CLKOSR. The default state is for the peripheral
function of GPIO B[7:4] to be programmed as A23 through A20. This can be changed by altering
A23 through A20, as shown in Figure 6-9.
Figure 6-9 CLKO Select Register (SIM_CLKOSR)
6.5.7.1
Reserved—Bits 15–10
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
6.5.7.2
Alternate GPIO_B Peripheral Function for A23 (A23)—Bit 9
0 = Peripheral output function of GPIO B[7] is defined to be A[23]
1 = Peripheral output function of GPIO B[7] is defined to be the oscillator clock (MSTR_OSC, see
6.5.7.3
Alternate GPIO_B Peripheral Function for A22 (A22)—Bit 8
0 = Peripheral output function of GPIO B[6] is defined to be A[22]
1 = Peripheral output function of GPIO B[6] is defined to be SYS_CLK2
Base + $A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
0
A23
A22
A21
A20
CLK
DIS
CLKOSEL
Write
RESET
0
0000
0
1
0
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