sak-c868p-1rr Infineon Technologies Corporation, sak-c868p-1rr Datasheet - Page 149

• Manufacturer Part Number: sak-c868p-1rr
• Description: 8 - Bit Cmos Microcontroller
• Manufacturer: Infineon Technologies Corporation

The baud rate of the serial port is controlled by a bit which are located in the special
function registers as shown below.
PCON
Power Control Register
Field
SMOD
Depending on the programmed operating mode different paths are selected for the baud
rate clock generation.
4.9.1.1
The baud rate in mode 2 depends on the value of bit SMOD in special function register
PCON. If SMOD = 0 (which is the value after reset), the baud rate is 1/64 of the system
frequency. If SMOD = 1, the baud rate is 1/32 of the system frequency.
4.9.1.2
In these modes the baud rate is variable and can be generated alternatively by a baud
rate generator or by timer 1.
Using the Timer 2 as Baud Rate Generator
In modes 1 and 3, the C868 can use timer 2 as the baud rate generator for the serial port.
To enable the baud generator for transmit, bit TCLK (bit 4 of special function register
User’s Manual
SMOD
rw
7
Baud Rate in Mode 2
Baud Rate in Mode 1 and 3
The functions of the shaded bits are not described here
6
-
r
Mode 2 baud rate =
Bits
7
5
-
r
Typ Description
rw
Double baud rate
When set, the baud rate of serial interface in modes
1, 2, 3 is doubled. After reset this bit is cleared.
SD
rw
4
2
64
SMOD
4-105
x
GF1
rw
system frequency
3
On-Chip Peripheral Components
GF0
rw
2
[Reset value: 0XXX0000
PDE
rw
1
V 1.0, 2003-01
IDLE
rw
C868
0
B
]