SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 265

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

Figure 15-3 Baudrate Deviation between Host and C164CM
The minimum baudrate (B
capacity of timer T3, when measuring the zero byte, thus, it depends on the CPU clock.
The minimum baudrate is obtained by using the maximum T3 count 2
formula. Baudrates below B
be initialized properly and the communication with the external host is likely to fail.
The maximum baudrate (B
deviation still does not exceed the limit; thus, all baudrates between B
below the deviation limit. B
external host will work properly without additional tests or investigations.
Higher baudrates, however, may be used if the actual deviation does not exceed the
indicated limit. A certain baudrate (marked I) in
limit, while an even higher baudrate (marked II) in
Any baudrate can be used for the bootstrap loader provided that the following three
prerequisites are fulfilled:
• Baudrate is within the specified operating range for the ASC0
• External host is able to use this baudrate
• Computed deviation error is below the limit.
Table 15-2
f
B
B
B
B
User’s Manual
CPU
MAX
High
STDmin
Low
2.5%
F
[MHz]
B
B
Low
Bootstrap Loader Baudrate Ranges
312,500
9,600
10
600
172
B
High
High
Low
Low
High
375,000
marks the baudrate up to which communication with the
would cause T3 to overflow. In this case, ASC0 cannot
19,200
in
in
12
600
206
Figure
Figure
15-7
15-3) is determined by the maximum count
15-3) is the highest baudrate at which the
500,000
19,200
Figure
16
Figure
600
275
15-3) may violate the deviation
15-3) stays very well below it.
625,000
19,200
20
600
343
C164CM/C164SM
Bootstrap Loader
16
Low
in the baudrate
and B
Derivatives
V1.0, 2002-02
781,250
38,400
MCA02260
B
25
High
600
429
Host
are