MC908LJ24CPKE Freescale Semiconductor, MC908LJ24CPKE Datasheet - Page 229
MC908LJ24CPKE
Manufacturer Part Number
MC908LJ24CPKE
Description
IC MCU 8BIT 24K FLASH 80-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908LK24CFUE.pdf
(464 pages)
Specifications of MC908LJ24CPKE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, IRSCI, SPI
Peripherals
LCD, LVD, POR, PWM
Number Of I /o
48
Program Memory Size
24KB (24K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC908LJ24CPKE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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12.9 Low-Power Modes
12.9.1 Wait Mode
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
RTCWE_R EQU
...
RTC_WRTIE_PROTECT
...
To disable write-protect after write-protect is enabled execute the
following code:
RTCWE1 EQU
RTCWE0 EQU
RTCWE_R EQU
...
RTC_WRITE_ENABLE
...
...
; Write-protect is disabled, RTC registers/bits can be written.
...
; Protect register/bits again after write access.
RTC_WRTIE_PROTECT
...
The STOP and WAIT instructions put the MCU in low power-
consumption standby modes.
The RTC module continues normal operation in wait mode. Any enabled
CPU interrupt request from the RTC can bring the MCU out of wait
mode. If the RTC is not required to bring the MCU out of wait mode,
power down the RTC by clearing the RTCE bit before executing the
WAIT instruction.
Real Time Clock (RTC)
$40
1
0
$40
;RTCCOMR register
BSET
BSET
;RTCWE1 bit
;RTCWE0 bit
;RTCCOMR register
BSET
BSET
BCLR
BSET
LDA
ORA
STA
BSET
BSET
BSET
RTCWE1,RTCWE_R ;write %10
RTCWE1,RTCWE_R ;write %10 again
RTCWE1,RTCWE_R ;write %10 twice to
RTCWE1,RTCWE_R ;ensure protected
RTCWE1,RTCWE_R ;write %00
RTCWE0,RTCWE_R ;write %01
RTCWE_R
#%00000011
RTCWE_R
RTCWE1,RTCWE_R ;write %10
RTCWE1,RTCWE_R ;write %10
RTCWE1,RTCWE_R ;write %10 again
;write %11
Real Time Clock (RTC)
Low-Power Modes
Data Sheet
229
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