mc9s08dn60 Freescale Semiconductor, Inc, mc9s08dn60 Datasheet - Page 252

• Manufacturer Part Number: mc9s08dn60
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 14 Real-Time Counter (S08RTCV1)
14.1.4
The block diagram for the RTC module is shown in
14.2
The RTC does not include any off-chip signals.
14.3
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 data sheet 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 14-1
252
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
SELECT
CLOCK
RTCLKS
Figure 14-2. Real-Time Counter (RTC) Block Diagram
RTCPS
W
W
W
R
R
R
RTC
CLOCK
Table 14-1. RTC Register Summary
MC9S08DN60 Series Data Sheet, Rev 2
RTIF
7
8-BIT COMPARATOR
8-BIT COUNTER
8-BIT MODULO
6
RTCLKS
(RTCMOD)
(RTCCNT)
Figure
5
14-2.
RTIE
4
RTCMOD
RTCCNT
V
DD
E
Write 1 to
D
RTIF
R
3
Q
RTIE
2
Freescale Semiconductor
RTCPS
RTIF
1
RTC
INTERRUPT
REQUEST
0