MC9S08SG32 FREESCALE [Freescale Semiconductor, Inc], MC9S08SG32 Datasheet - Page 204

• Manufacturer Part Number: MC9S08SG32
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 13 Real-Time Counter (S08RTCV1)
13.1.3
The block diagram for the RTC module is shown in
13.2
The RTC does not include any off-chip signals.
13.3
The RTC includes a status and control register, an 8-bit counter register, and an 8-bit modulo register.
Refer to the direct-page register summary in the memory section of this document for the absolute address
assignments for all RTC registers.This section refers to registers and control bits only by their names and
relative address offsets.
Table 13-1
198
Background
Mode
ERCLK
IRCLK
LPO
External Signal Description
Register Definition
RTCMOD
RTCCNT
RTCSC
is a summary of RTC registers.
Block Diagram
Name
RTCLKS[0]
Prescaler
Divide-By
Source
RTCLKS
Select
Clock
Figure 13-2. Real-Time Counter (RTC) Block Diagram
RTCPS
W
W
W
R
R
R
Clock
RTC
Table 13-1. RTC Register Summary
RTIF
7
MC9S08SG32 Data Sheet, Rev. 8
8-Bit Comparator
6
8-Bit Counter
RTCLKS
8-Bit Modulo
(RTCMOD)
(RTCCNT)
Figure
5
13-2.
RTIE
4
RTCMOD
RTCCNT
V
DD
E
Write 1 to
D
RTIF
R
3
Q
RTIE
2
Freescale Semiconductor
RTCPS
RTIF
1
Interrupt
Request
RTC
0