PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 250

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
BG represents the contents of the reload register S0BG (BR_VALUE), taken as
unsigned 13-bit integer.
The maximum baudrate that can be achieved for the asynchronous modes when using
the two fixed clock dividers and a module clock of 24 MHz is 0.5 MBaud. Table 15-5
below lists various commonly used baudrates together with the required reload values
and the deviation errors compared to the intended baudrate.
Table 15-5
Baudrate
19.2
9600
Note: S0CON_FDE must be 0 to achieve the baudrates in the table above. The
Using the Fractional Divider
When the fractional divider is selected, the input clock f
derived from the module clock f
fractional divider is activated, It divides f
0 to 511. If n=0, the divider ratio is 1 which means that f
divider allows to program the baudrrate with a much better accuracy than with the two
fixed prescaler divider stages.
Table 15-6
FDE
1
BG represents the content of the reload register S0BG (BR_VALUE), taken as unsigned
13-bit integer. FDV represents the content of the fractional divider register S0FDV
(FD_VALUE) taken as unsigned 9-bit integer. For example, typical asynchronous
baudrates are shown in Table 15-7.
deviation errors given in the table above are rounded. Using a baudrate crystal will
provide correct baudrates without deviation errors.
KBaud
Baud
BRS
X
Typical Asynchronous Baudrates using the Fixed Input Clock
Asynchronous Baudrate Formulas using the Fractional Input Clock
Dividers
Divider
BRS = ‘0’, f
Deviation Error
+ 0.16 %
+ 0.16 %
BG
1 ... 8191
MOD
MOD
FDV
1 ... 511
0
= 24 MHz
by a programmable divider. If S0CON_FDE=1, the
Reload Value
0026
004C
The Asynchronous / Synchr. Serial Interface
MOD
250
H
H
by a fraction of n/512 for any value of n from
Formula
Baudrate =
Baudrate =
DIV
BRS = ‘1’, f
Deviation Error
+ 0.16 %
+ 0.16 %
=f
16 x (BG+1)
DIV
MOD
FDV
512
for the baudrate timer is
f
. In general, the fractional
MOD
MOD
x
= 24 MHz
16 x (BG+1)
Reload Value
0019
0033
f
PSB 21473
MOD
2003-03-31
H
H
INCA-D