MC908LJ24CFUER Freescale Semiconductor, MC908LJ24CFUER Datasheet - Page 228

IC MCU 24K FLASH 8MHZ SPI 64-QFP

MC908LJ24CFUER

Manufacturer Part Number
MC908LJ24CFUER
Description
IC MCU 24K FLASH 8MHZ SPI 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC908LJ24CFUER

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, IRSCI, SPI
Peripherals
LCD, LVD, POR, PWM
Number Of I /o
40
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
64-QFP
Processor Series
HC08LJ
Core
HC08
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
SCI, SPI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
48
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, M68EML08LJLKE, ZK-HC08LX-A, M68CBL05CE
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 6 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC908LJ24CFUER
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Real Time Clock (RTC)
Data Sheet
228
Note: Reading RTCWE[1:0]
Write any value
other than 10
to RTWE
always return 00.
Write-Protect
DISABLED
Figure 12-5. RTC Write Protect State Diagram
The mechanism uses the RTCWE[1:0] bits in the RTC calibration control
register (RTCCOMR) in a state machine, which requires a bit-write
sequence to disable the write-protection. A block diagram of the state
machine is shown in
After a reset, the write-protect mechanism is disabled, allowing the user
code to calibrate the RTC clock, set the time in the clock registers, and
set the date in the calendar registers.
To enable write-protect after reset or write-protect is disabled execute
the following code:
RTCWE1 EQU
RTCWE0 EQU
Write any value
other than 00
to RTWE
Real Time Clock (RTC)
RTCWE = 00
1
0
Figure
;RTCWE1 bit
;RTCWE0 bit
12-5.
Write-Protect ENABLED
RTCWE 01
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
RTCWE = 10
RTCWE = 11

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