XC164CS-16F Datasheet, PDF (39/78 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core

XC164-16
Derivatives
Functional Description
3.9
Real Time Clock
The Real Time Clock (RTC) module of the XC164 is directly clocked via a separate clock
driver with the prescaled on-chip main oscillator frequency (f_RTC = f_OSCm/32). It is
therefore independent from the selected clock generation mode of the XC164.
The RTC basically consists of a chain of divider blocks:
• a selectable 8:1 divider (on - off)
• the reloadable 16-bit timer T14
• the 32-bit RTC timer block (accessible via registers RTCH and RTCL), made of:
– a reloadable 10-bit timer
– a reloadable 6-bit timer
– a reloadable 6-bit timer
– a reloadable 10-bit timer
All timers count up. Each timer can generate an interrupt request. All requests are
combined to a common node request.
f_RTC
:8
MUX
RUN
PRE
T14REL
Interrupt Sub Node
CNT
INT0
CNT
INT1
CNT
INT2
RTCINT
CNT
INT3
10 Bits
REL-Register
6 Bits 6 Bits
10 Bits
f_CNT
T14
T14-Register
10 Bits
6 Bits 6 Bits
CNT-Register
10 Bits
MCB05568
Figure 9 RTC Block Diagram
Note: The registers associated with the RTC are not affected by a reset in order to
maintain the correct system time even when intermediate resets are executed.
Data Sheet
37
V2.2, 2006-03