MC9S08RE16FDE Freescale Semiconductor, MC9S08RE16FDE Datasheet - Page 111
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MC9S08RE16FDE
Manufacturer Part Number
MC9S08RE16FDE
Description
IC MCU 16K FLASH 1K RAM 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Specifications of MC9S08RE16FDE
Core Processor
HCS08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
39
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
48-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
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The high/low time counter is an 8-bit up counter. After each increment, the contents of the counter are
compared with the appropriate high or low count value register. When the compare value is reached, the
counter is reset to a value of $01, and the compare is redirected to the other count value register.
Assuming that the high time count compare register is currently active, a valid compare will cause the
carrier output to be driven low. The counter will continue to increment (starting at reset value of $01).
When the value stored in the selected low count value register is reached, the counter will again be reset
and the carrier output will be driven high.
The cycle repeats, automatically generating a periodic signal that is directed to the modulator. The lowest
frequency (maximum period) and highest frequency (minimum period) that can be generated are defined
as:
In the general case, the carrier generator output frequency is:
Where:
Freescale Semiconductor
CARRIER OUT (f
0 < Highcount < 256 and
0 < Lowcount < 256
MCGEN
CMTCLK
BASE
FSK
CG
)
f
CG
Figure 8-3. Carrier Generator Block Diagram
= f
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
f
CMTCLK
min
f
max
= f
CLK
CLR
÷ (Highcount + Lowcount) Hz
CMTCLK
= f
CMTCLK
CMTCGH2
CMTCGH1
8-BIT UP COUNTER
CMTCGL1
CMTCGL2
÷ (2 x (2
÷ (2 x 1) Hz
=?
=?
8
– 1)) Hz
Carrier Modulator Transmitter (CMT) Block Description
SECONDARY
PRIMARY/
SELECT
Eqn. 8-1
Eqn. 8-2
Eqn. 8-3
111
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