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鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� MCF5270CVM150R2
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋佹暩(sh霉)锛� 427/626闋�
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC MCU 32BIT 150MHZ 196-MAPBGA
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 750
绯诲垪锛� MCF527x
鏍稿績铏曠悊鍣細 Coldfire V2
鑺珨灏哄锛� 32-浣�
閫熷害锛� 150MHz
閫i€氭€э細 EBI/EMI锛屼互澶恫(w菐ng)锛孖²C锛孲PI锛孶ART/USART
澶栧湇瑷�(sh猫)鍌欙細 DMA锛學DT
杓稿叆/杓稿嚭鏁�(sh霉)锛� 97
绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 ROMless
RAM 瀹归噺锛� 64K x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 1.4 V ~ 1.6 V
鎸暕鍣ㄥ瀷锛� 澶栭儴
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 196-LBGA
鍖呰锛� 甯跺嵎 (TR)
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Memory Map/Register Definition
MCF5271 Reference Manual, Rev. 2
Freescale Semiconductor
25-9
25.5.2 I2C Frequency Divider Register (I2FDR)
The I2FDR, shown in Figure 25-10, provides a programmable prescaler to configure the I2C clock
for bit-rate selection.
76
54
32
10
R0
0
IC
W
Reset
0
00
000
00
Address
IPSBAR + 0x00_0304
Figure 25-10. I2C Frequency Divider Register (I2FDR)
Table 25-3. I2FDR Field Descriptions
Bits
Name
Description
7鈥�6
鈥�
Reserved, should be cleared.
5鈥�0
IC
I2C clock rate. Prescales the clock for bit-rate selection. The serial bit clock frequency is
equal to the internal bus clock divided by the divider shown below. Due to potentially slow
I2C_SCL and I2C_SDA rise and fall times, bus signals are sampled at the prescaler
frequency.
IC
Divider
IC
Divider
IC
Divider
IC
Divider
0x00
28
0x10
288
0x20
20
0x30
160
0x01
30
0x11
320
0x21
22
0x31
192
0x02
34
0x12
384
0x22
24
0x32
224
0x03
40
0x13
480
0x23
26
0x33
256
0x04
44
0x14
576
0x24
28
0x34
320
0x05
48
0x15
640
0x25
32
0x35
384
0x06
56
0x16
768
0x26
36
0x36
448
0x07
68
0x17
960
0x27
40
0x37
512
0x08
80
0x18
1152
0x28
48
0x38
640
0x09
88
0x19
1280
0x29
56
0x39
768
0x0A
104
0x1A
1536
0x2A
64
0x3A
896
0x0B
128
0x1B
1920
0x2B
72
0x3B
1024
0x0C
144
0x1C
2304
0x2C
80
0x3C
1280
0x0D
160
0x1D
2560
0x2D
96
0x3D
1536
0x0E
192
0x1E
3072
0x2E
112
0x3E
1792
0x0F
240
0x1F
3840
0x2F
128
0x3F
2048
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
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