MC9S08DN32AVLF Freescale Semiconductor, MC9S08DN32AVLF Datasheet - Page 254
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MC9S08DN32AVLF
Manufacturer Part Number
MC9S08DN32AVLF
Description
MCU 8BIT 32K FLASH 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS08r
Specifications of MC9S08DN32AVLF
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
39
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 16x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 105°C
Package / Case
48-LQFP
Processor Series
S08DN
Core
HCS08
Data Bus Width
8 bit
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08DZ60
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S08DN32AVLF
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Chapter 14 Real-Time Counter (S08RTCV1)
14.3.2
RTCCNT is the read-only value of the current RTC count of the 8-bit counter.
14.3.3
14.4
The RTC is composed of a main 8-bit up-counter with an 8-bit modulo register, a clock source selector,
and a prescaler block with binary-based and decimal-based selectable values. The module also contains
software selectable interrupt logic.
After any MCU reset, the counter is stopped and reset to 0x00, the modulus register is set to 0x00, and the
prescaler is off. The 1-kHz internal oscillator clock is selected as the default clock source. To start the
prescaler, write any value other than zero to the prescaler select bits (RTCPS).
Three clock sources are software selectable: the low power oscillator clock (LPO), the external clock
(ERCLK), and the internal clock (IRCLK). The RTC clock select bits (RTCLKS) select the desired clock
source. If a different value is written to RTCLKS, the prescaler and RTCCNT counters are reset to 0x00.
254
RTCMOD
RTCCNT
Field
Field
7:0
7:0
Reset:
Reset:
Functional Description
W
W
R
R
RTC Count. These eight read-only bits contain the current value of the 8-bit counter. Writes have no effect to this
register. Reset, writing to RTCMOD, or writing different values to RTCLKS and RTCPS clear the count to 0x00.
RTC Modulo. These eight read/write bits contain the modulo value used to reset the count to 0x00 upon a compare
match and set the RTIF status bit. A value of 0x00 sets the RTIF bit on each rising edge of the prescaler output.
Writing to RTCMOD resets the prescaler and the RTCCNT counters to 0x00. Reset sets the modulo to 0x00.
RTC Counter Register (RTCCNT)
RTC Modulo Register (RTCMOD)
7
0
7
0
0
0
6
Figure 14-4. RTC Counter Register (RTCCNT)
6
Figure 14-5. RTC Modulo Register (RTCMOD)
Table 14-5. RTCMOD Field Descriptions
Table 14-4. RTCCNT Field Descriptions
MC9S08DN60 Series Data Sheet, Rev 3
0
0
5
5
0
0
4
4
Description
Description
RTCMOD
RTCCNT
0
0
3
3
0
0
2
2
Freescale Semiconductor
0
0
1
1
0
0
0
0
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