SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 354

• 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
also reset bit WDTR. After being serviced the watchdog timer continues counting up from
the value (<WDTREL> * 2
the chance of unintentionally servicing the watchdog timer (eg. by fetching and executing
a bit pattern from a wrong location) is minimized. When instruction SRVWDT does not
match the format for protected instructions the Protection Fault Trap will be entered,
rather than the instruction be executed.
The time period for an overflow of the watchdog timer is programmable in two ways:
• the input frequency to the watchdog timer can be selected via bit WDTIN in register
• the reload value WDTREL for the high byte of WDT can be programmed in register
The period P
therefore be determined by the following formula:
Note: For safety reasons, the user is advised to rewrite WDTCON each time before the
WDTCON to be either f
WDTCON.
watchdog timer is serviced.
WDT
between servicing the watchdog timer and the next overflow can
P
WDT
8
CPU
). Instruction SRVWDT has been encoded in such a way that
=
/2 or f
2
(1 + <WDTIN>*6)
CPU
/128.
354
* (2
f
16
CPU
- <WDTREL> * 2
Watchdog Timer (WDT)
8
)
2001-04-19
C161U