MC68HC705T16 MOTOROLA [Motorola, Inc], MC68HC705T16 Datasheet - Page 60
MC68HC705T16
Manufacturer Part Number
MC68HC705T16
Description
High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705T16.pdf
(128 pages)
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6
6.3.1
ADR1-ADR7 are the slave address bits of the M-Bus module.
6.3.2
MBC0-MBC4 are used for clock rate selection. The serial bit clock frequency is equal to the CPU
clock divided by the divider shown in Table 6-1.
For a 4.2MHz external crystal operation (2.1MHz internal operating frequency), the serial bit clock
frequency of M-Bus ranges from 483Hz to 95,455Hz.
MOTOROLA
6-6
MBC4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address
Address
$37
$38
MBC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
M-Bus Address Register (MADR)
M-Bus Clock Register (MCKR)
ADR7
bit 7
bit 7
MBC2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
ADR6
MBC1
bit 6
bit 6
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
MBC0
ADR5
bit 5
bit 5
M-BUS SERIAL INTERFACE
Table 6-1 M-Bus Prescaler
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DIVIDER
MBC4
ADR4
bit 4
bit 4
112
136
176
192
224
272
22
24
28
34
44
48
56
68
88
96
MBC3
ADR3
bit 3
bit 3
MBC4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MBC2
ADR2
bit 2
bit 2
MBC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ADR1
MBC1
bit 1
bit 1
MBC2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
MBC0
bit 0
bit 0
MBC1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0000 0000
0000 0000
MBC0
on reset
on reset
MC68HC05T16
State
State
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DIVIDER
1088
1408
1536
1792
2176
2816
3072
3584
4352
352
384
448
544
704
768
896
TPG
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