參數(shù)資料
型號(hào): MC68HC705BD3
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數(shù): 52/112頁
文件大?。?/td> 676K
代理商: MC68HC705BD3
MOTOROLA
7-6
MC68HC05BD3
M-BUS SERIAL INTERFACE
7
7.3.1
M-Bus Address Register (MADR)
MAD1-MAD7 are the slave address bits of the M-Bus module.
7.3.2
M-Bus Frequency Register (MFDR)
FD0-FD4 are used for clock rate selection. The serial bit clock frequency is equal to the CPU clock
divided by the divider shown in Table 7-1.
For a 4MHz external crystal operation (2MHz internal operating frequency), the serial bit clock
frequency of M-Bus ranges from 460Hz to 90,909Hz.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$0017
MAD7
MAD6
MAD5
MAD4
MAD3
MAD2
MAD1
0000 0000
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$0018
FD4
FD3
FD2
FD1
FD0
0000 0000
Table 7-1
M-Bus Prescaler
FD4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
FD3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
FD2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
FD1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
FD0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DIVIDER
22
24
28
34
44
48
56
68
88
96
112
136
176
192
224
272
FD4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FD3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
FD2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
FD1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
FD0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DIVIDER
352
384
448
544
704
768
896
1088
1408
1536
1792
2176
2816
3072
3584
4352
TPG
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