SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 358

• 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

Data Sheet
This process may go through several iterations or may directly execute the final
application. In all cases the C161U will still run in BSL mode, ie. with the watchdog timer
disabled and limited access to the internal code memory.
Exiting Bootstrap Loader Mode
In order to execute a program in normal mode, the BSL mode must be terminated first.
C161U exits BSL mode upon a software reset (ignores the level on P0L.4) or a hardware
reset (P0L.4 must be high then!). After a reset the C161U will start executing from
location 00’0000
Choosing the Baudrate for the BSL
The calculation of the serial baudrate for ASC from the length of the first zero byte that
is received, allows the operation of the bootstrap loader of the C161U with a wide range
of baudrates. However, the upper and lower limits have to be kept, in order to insure
proper data transfer.
C161U uses timer T6 to measure the length of the initial zero byte. The quantization
uncertainty of this measurement implies the first deviation from the real baudrate, the
next deviation is implied by the computation of the S0BRL reload value from the timer
contents. The formula below shows the association:
For a correct data transfer from the host to the C161U the maximum deviation between
the internal initialized baudrate for ASC and the real baudrate of the host should be
below 2.5%. The deviation (F
can be calculated via the formula below:
H
of the external memory (make sure, pin EA is tied to ’0’ signal).
F B
S0BRL
=
B
--------------------------------------- -
Contr
=
B
, in percent) between host baudrate and C161U baudrate
B
B
T6
------------------ -
Contr
C161U
–
72
–
B
36
Host
------------------------------------------ -
32
358
,
100
S0BRL
f CPU
%
T6
,
+
=
1
9
--
4
F B
---------------
B Host
f CPU
2,5
%
Bootstrap Loader
2001-04-19
C161U