SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 359

• Manufacturer Part Number: SAF-C161U-LF V1.3
• Description: IC MCU ISDN 16BIT TTL TQFP-100
• Manufacturer: Infineon Technologies
• Series: C16xxr

Specifications of SAF-C161U-LF V1.3

• Core Processor: C166
• Core Size: 16-Bit
• Speed: 36MHz
• Connectivity: EBI/EMI, SPI, UART/USART, USB
• Peripherals: POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: SAFC161ULFV1.3X; SAFC161ULFV13XP; SP000007502

C161U
Bootstrap Loader
Note: Function (F
) does not consider the tolerances of oscillators and other devices
B
supporting the serial communication.
This baudrate deviation is a nonlinear function depending on the CPU clock and the
baudrate of the host. The maxima of the function (F
) increase with the host baudrate
B
due to the smaller baudrate prescaler factors and the implied higher quantization error
(see figure below).
F
B
2.5%
B
B
B
Low
High
Host
MCA02260
Figure 113
Baudrate deviation between host and C161U
Minimum baudrate (B
in the figure above) is determined by the maximum count
Low
capacity of timer T6, when measuring the zero byte, ie. it depends on the CPU clock.
16
Using the maximum T6 count 2
in the formula the minimum baudrate for f
=20 MHz
CPU
is 687 Baud. The lowest standard baudrate in this case would be 1200 Baud. Baudrates
below B
would cause T6 to overflow. In this case ASC cannot be initialized properly.
Low
Maximum baudrate (B
in the figure above) is the highest baudrate where the
High
deviation still does not exceed the limit, ie. all baudrates between B
and B
are
Low
High
below the deviation limit. The maximum standard baudrate that fulfills this requirement
is 19200 Baud.
Higher baudrates, however, may be used as long as the actual deviation does not
exceed the limit. A certain baudrate (marked I) in the figure) may eg. violate the deviation
limit, while an even higher baudrate (marked II) in the figure) stays very well below it. This
depends on the host interface.
Data Sheet
359
2001-04-19