TC1775 Datasheet, PDF (55/101 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1775
Preliminary
• Important debugging support is provided through the reset prewarning operation by
first issuing an NMI to the CPU before finally resetting the device after a certain period
of time.
Real Time Clock
Figure 15 shows a global view of all functional blocks oft he RTC interface.
32 kHz
XTAL3
RTC
O scillator
XTAL4
f_{RTC_COUNT}
f_SYS
SCU ^Mode_Select
RTC
M odule
(K e rn e l)
RTCINT Interrupt
Control
A d d re s s
Decoder
M C B04808
Figure 15 Block Diagram of the RTC Interface
The Real Time Clock (RTC) module is an independent timer chain that counts time ticks.
The base frequency of the RTC can be programmed via a reload counter. The RTC can
work asynchronously with the system frequency, and is optimized on low power
consumption.
Features:
• On-chip 32.768 kHz oscillator for counting current time and date
• Cyclic time-based interrupts
• Alarm interrupt for wake-up on a defined time
• 48-bit timer for long-term measurements
Data Sheet
51
V1.2, 2002-05