MC908LJ24CPKE Freescale Semiconductor, MC908LJ24CPKE Datasheet - Page 224

• Manufacturer Part Number: MC908LJ24CPKE
• Description: IC MCU 8BIT 24K FLASH 80-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

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: -

Real Time Clock (RTC)
12.5.5 Timebase Interrupts
12.6 RTC Interrupts
Data Sheet
224
The value in the chronograph data register satisfies the following
equation:
The accuracy of the chronograph counter is ±5ms (max).
In addition to the second, minute, hour, and day periodic interrupts
generated by the clock functions, the divider circuits generates four
periodic clocks, separated into two groups: 2Hz and 4Hz; 8Hz and
16Hz. The TBH bit in the RTC control register 2 (RTCCR2) selects the
group for the timebase interrupts, indicated by TB1F and TB2F flags. A
CPU interrupt request is generated if the corresponding enable bits
(TB1IE and TB2IE) are also set.
The RTC has one alarm interrupt and seven periodic interrupts:
A CPU interrupt request is generated if the corresponding interrupt
enable bits are also set.
•
•
Alarm interrupt
Periodic interrupts:
– Second
– Minute
– Hour
– Day
– 1/128 seconds (chronograph)
– Timebase 1 and 2:
1/2 seconds and 1/4 seconds, or
1/8 seconds and 1/16 seconds
(128Hz counter value 25)
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Real Time Clock (RTC)
32
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MC68HC908LJ24/LK24 — Rev. 2.1
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Freescale Semiconductor