MC68HC908LK24CFQ Freescale Semiconductor, MC68HC908LK24CFQ Datasheet - Page 233
MC68HC908LK24CFQ
Manufacturer Part Number
MC68HC908LK24CFQ
Description
IC MCU 24K FLASH 8MHZ SPI 80-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908LK24CFUE.pdf
(464 pages)
Specifications of MC68HC908LK24CFQ
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
80-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC908LK24CFQ
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68HC908LK24CFQ
Manufacturer:
FRE/MOT
Quantity:
20 000
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12.10.2 RTC Calibration Data Register (RTCCDAT)
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
Address:
The RTC calibration data register (RTCCDAT) contains the RTC
calibration data.
EOVL — E Register Overflow
E[5:0] — RTC Compensation Value (E register)
Reset:
Read:
Write:
This read-only bit indicates that the time difference recorded between
CALIN and CGMXCLK after 15 seconds during the last automatic
calibration had exceeded 31 CGMXCLK cycles. Clear this flag by
writing to the E register after the CAL bit is set. Setting the AUTOCAL
bit will also clear this flag, but subsequent automatic calibration may
set this flag again.
E[5:0] is a two’s complement number which indicates the number of
CGMXCLK cycles the RTC requires to compensate for a 15 second
duration. If the compensation exceeds the limit of ±31 CGMXCLK
cycles, the E[5:0] bits remain at the maximum value of –30 (%100010)
or +30 (%011110), and the EOVL flag will be set.
When compensation is enabled (COMEN = 1): If E is negative, an E
number of cycles will be subtracted from the 491520 CGMXCLK
cycles (32768 × 15).
When compensation is enabled (COMEN = 1): If E is positive, an E
number of cycles will be added to the 491520 CGMXCLK cycles
(32768 × 15).
E[5:0] is written by the RTC compensation circuit during automatic
calibration (AUTOCAL = 1). User can only write to E{5:0] when
AUTOCAL = 0 and CAL = 1. Reset has no effect on E[1:0] bits.
Figure 12-7. RTC Calibration Data Register (RTCCDAT)
1 = E register overflow detected during the last automatic
0 = No E register overflow detected during last automatic
$0041
EOVL
calibration
calibration
U
Real Time Clock (RTC)
0
0
E5
U
E4
U
E3
U
E2
U
Real Time Clock (RTC)
E1
U
RTC Registers
Data Sheet
E0
U
233
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