SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 294

• 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
• RTC is switched to asynchronous mode if the system is not in slowdown mode and
This means that the mode is controlled by bit RCS of register SYSCON2 (see page 390)
unless the system's clock setting indicates that no or an unreliable CPU clock is
available. In the latter case, synchronous mode is not working and thus the RTC is forced
into asynchronous mode.
As long as the CPU clock is four times faster than the RTC_REF_CLK, the RTC module
can be operated in synchronous mode. Otherwise the asynchronous mode has to be
selected by software.
In asynchronous mode no writing but only asynchronous reading to the registers via the
internal bus is possible.
13.2.1
Figure 92 shows the RTC block diagram:
Figure 92
13.2.2
The operating behaviour of the RTC module is controlled by the RTCCON register. The
RTC starts counting by setting the run bit RTCR. After reset the run bit is set and the RTC
automatically starts operation. The bit RTCPRE selects a prescaler which divides the
the system clock is not locked (observe selected CLK_CFG as set during Reset).
RTC_REF_CLK
RTCPRE
RTC Block Diagram
RTC Control
MUX
RTC Block Diagram
T14_IN
8:1
RTCR
T14REL (16 bit)
T14 (16 bit)
294
RTCL
RTCRELL
RTC0INT
10 bit
10 bit
RTC1INT
6 bit
6 bit
altern. source fast ext. interrupt 7
Interrupt Sub Node RTCISNC
Real Time Clock (RTC)
RTC2INT
RTC_INT irq(15) and
RTCH
RTCRELH
6 bit
6 bit
RTC_T14INT xb(3)
10 bit
RTC3INT
10 bit
2001-04-19
C161U