MC908LJ24CFUER Freescale Semiconductor, MC908LJ24CFUER Datasheet - Page 226

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)
12.7.1 Calibration Error
Data Sheet
226
–30 ≤ E ≤ –16
–15 ≤ E ≤ –1
16 ≤ E ≤ 30
1 ≤ E ≤ 15
E
E = 0
Table 12-2. Compensation Algorithm for Different Values of E
CGMXCLK Cycles
(|E| – 15) × 32766
(|E| – 15) × 32770
A negative E-value indicates the number of CGMXCLK cycles that
needs to be subtracted, because the CGMXCLK is slower than the ideal
32.768kHz; 32768 CGMXCLK cycles will be more longer than 1-second.
A positive E-value indicates the number of CGMXCLK cycles that needs
to be added, because the CGMXCLK is faster than the ideal 32.768kHz;
32768 CGMXCLK cycles will be more shorter than 1-second.
If the time difference is more than 31 CGMXCLK cycles, the E-register
will overflow, causing the EVOL flag to be set. The maximum (+30) or
minimum (–30) value will remain in the E-register.
After calibration, with the E-value stored in the calibration data register,
clock compensation is only enabled when the COMEN bit is set in
RTCCR2. As the E-value is the time difference for 15 seconds, the
CGMXCLK is modified for every 15-second intervals. The CGMXCLK
additions and subtractions are simulated using programmable dividers,
therefore, the compensated clock does not have the same period within
the 15-second, but is consistent for every 15-second periods. See
12-2
During clock calibration, the reference signal to the CALIN pin is not
synchronized to the CGMXCLK being measured. A maximum
inaccuracy of minus 1.5×CGMXCLK period or plus 1×CGMXCLK period
will be introduced to the time difference measured.
Number of
|E| × 32767
|E| × 32769
and
No compensation is required: Divider is 32768 throughout.
Period A
Figure
Real Time Clock (RTC)
12-4.
CGMXCLK
Divider A
32766
32767
32769
32770
CGMXCLK Cycles
(30 – |E|) × 32767
(15 – |E|) × 32768
(15 – |E|) × 32768
(30 – |E|) × 32769
Number of
MC68HC908LJ24/LK24 — Rev. 2.1
Period B
Freescale Semiconductor
CGMXCLK
Divider B
32767
32768
32769
32769
Table

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