MC9S08RE16FDE Freescale Semiconductor, MC9S08RE16FDE Datasheet - Page 113
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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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8.5.2.1
When the modulator operates in time mode (MCGEN bit is set, BASE bit is clear, and FSK bit is clear),
the modulation mark period consists of an integer number of CMTCLK ÷ 8 clock periods. The modulation
space period consists of zero or an integer number of CMTCLK ÷ 8 clock periods. With an 8 MHz bus and
CMTDIV1:CMTDIV0 = 00, the modulator resolution is 1 µs and has a maximum mark and space period
of about 65.535 ms each. See
The mark and space time equations for time and baseband mode are:
where CMTCMD1:CMTCMD2 and CMTCMD3:CMTCMD4 are the decimal values of the concatenated
registers.
Freescale Semiconductor
0
Time Mode
If the modulator is disabled while the t
carrier high time (t
into an illegal state and end the curent cycle before the programmed value.
Make sure to program t
illegal state.
* DENOTES HIDDEN REGISTER
SPACE PERIOD REGISTER *
17-BIT DOWN COUNTER *
CMTCMD1:CMTCMD2
CMTCMD3:CMTCMD4
16 BITS
16 BITS
=?
t
mark
16
16
t
space
Figure 8-5
= (CMTCMD1:CMTCMD2 + 1) ÷ (f
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
= CMTCMD3:CMTCMD4 ÷ (f
mark
Figure 8-4. Modulator Block Diagram
LOAD
mark
< CMTCGH1/f
for an example of the time mode and baseband mode outputs.
greater than the carrier high time to avoid this
.
NOTE
SYSTEM CONTROL
CLOCK CONTROL
mark
CMTCLK
time is less than the programmed
MODE
CMTCLK
Carrier Modulator Transmitter (CMT) Block Description
MODULATOR GATE
CMTCLK
), the modulator can enter
÷ 8)
÷ 8)
MODULE INTERRUPT REQUEST
PRIMARY/SECONDARY SELECT
÷
.
EOC FLAG SET
8
CARRIER OUT (f
CMTCLOCK
MODULATOR
CG
)
OUT
Eqn. 8-5
Eqn. 8-6
113
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