Section 20 Realtime Clock (RTC)
Rev.1.00 Dec. 13, 2005 Page 732 of 1286
REJ09B0158-0100
20.6.3 Interrupt
source and request generating order
If it occurs complex interrupt source of alarm interrupts (ATI), periodic interrupts (PFI), and carry
interrupts (CUI) at the same time, the RTC generates interrupt request as shown in figure 20.6.
Pck
(50MHz)
EXTAL2
(32.768kHz)
TCLK
(16.384kHz)
RSECCNT[7:0]
second counter register
R64CNT[7:0]
64Hz counter register
RCR2.PEF
periodical interrupt flag
(interrupt request signal)
RCR1.CF
carry flag
(interrupt request signal)
RCR1.AF
alarm flag
(interrupt request signal)
n+1
H'7F
n
carry, periodical, and alarm interrupt
EXTAL2 4 clock cycles
carry
ready period
H'00
Pck 2 clock cycles
Pck 4 to 6 clock cycles
Pck 6 to 8 clock cycles
Figure 20.6 Interrupt Request Signal Generation Timing of Complex Sources
Содержание SH7780 Series
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