mc9s08sh8mwjr Freescale Semiconductor, Inc, mc9s08sh8mwjr Datasheet - Page 196
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mc9s08sh8mwjr
Manufacturer Part Number
mc9s08sh8mwjr
Description
S08sh 5-volt 8-bit Microcontrollers With Sci, Spi, I2c, Adc And Analog Comparators
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S08SH8MWJR.pdf
(328 pages)
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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
196
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
MC9S08SH32 Series Data Sheet, Rev. 2
Table 13-1. RTC Register Summary
RTIF
7
PRELIMINARY
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
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