Register Definition; Rtc Status And Control Register 1 (Rtc_Sc1) - Freescale Semiconductor MC9S08PT60 Reference Manual

14.4 Register definition

The RTC includes a status and control register, a 16-bit counter register, and a 16-bit
modulo register.
Absolute
address
(hex)
306A

RTC Status and Control Register 1 (RTC_SC1)

306B RTC Status and Control Register 2 (RTC_SC2)
306C RTC Modulo Register: High (RTC_MODH)
306D RTC Modulo Register: Low (RTC_MODL)
306E RTC Counter Register: High (RTC_CNTH)
306F RTC Counter Register: Low (RTC_CNTL)
14.4.1 RTC Status and Control Register 1 (RTC_SC1)
RTC_SC1 contains the real-time interrupt status flag (RTIF), and the toggle output
enable bit (RTCO).
Address: 306Ah base + 0h offset = 306Ah
Bit 7
Read
RTIF
Write
Reset 0
Field
7 Real-Time Interrupt Flag
RTIF
This status bit indicates the RTC counter register reached the value in the RTC modulo register. Writing a
logic 0 has no effect. Writing a logic 1 clears the bit and the real-time interrupt request. Reset clears RTIF
to 0.
0 RTC counter has not reached the value in the RTC modulo register.
1 RTC counter has reached the value in the RTC modulo register.
6 Real-Time Interrupt Enable
RTIE
This read/write bit enables real-time interrupts. If RTIE is set, then an interrupt is generated when RTIF is
set. Reset clears RTIE to 0.
Freescale Semiconductor, Inc.
RTC memory map
Register name
6 5
0
RTIE RTCO
0 0
RTC_SC1 field descriptions
Table continues on the next page...
MC9S08PT60 Reference Manual, Rev. 4, 08/2014
Chapter 14 Real-time counter (RTC)
Width
Access
(in bits)
8 R/W
8 R/W
8 R/W
8 R/W
8 R
8 R
4 3 2
0 0 0
Description
Section/
Reset value
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1 0
0
0 0
407