DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 446
DF2148RTE20IV
Manufacturer Part Number
DF2148RTE20IV
Description
MCU 5V 128K I-TEMP,PB-FREE, 100-
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Specifications of DF2148RTE20IV
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
Host Interface, I²C, IrDA, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Section 13 Timer Connection
13.3.6
Internal Synchronization Signal Generation (IHG/IVG/CL4 Signal Generation)
By using the timer connection FRT and TMRY, it is possible to automatically generate internal
signals (IHG and IVG signals) corresponding to the IHI and IVI signals. As the IHG signal is
synchronized with the rise of the IVG signal, the IHG signal period must be made a divisor of the
IVG signal period in order to keep it constant. In addition, the CL4 signal can be generated in
synchronization with the IHG signal.
The contents of OCRA in the FRT are updated by the automatic addition of the contents of
OCRAR or OCRAF, alternately, each time a compare-match occurs. A value corresponding to the
0 interval of the IVG signal is written in OCRAR, and a value corresponding to the 1 interval of
the IVG signal is written in OCRAF. The IVG signal is set by a compare-match after an OCRAR
addition, and reset by a compare-match after an OCRAF addition.
The IHG signal is the TMRY 8-bit timer output. TMRY is set to count internal clock pulses, and
to be cleared on TCORA compare-match, to fix the period and set the timer output. TCORB is set
so as to reset the timer output. The IVG signal is connected as the TMRY reset input (TMRI), and
the rise of the IVG signal can be treated in the same way as a TCORA compare-match.
The CL4 signal is a waveform that rises within one system clock period after the fall of the IHG
signal, and has a 1 interval of 6 system clock periods.
Examples of settings of TCORA, TCORB, TCR, and TCSR in TMRY, and OCRAR, OCRAF,
and TCR in the FRT, are shown in table 13.8, and the IHG signal/IVG signal timing chart is
shown in figure 13.8.
Rev. 4.00 Sep 27, 2006 page 400 of 1130
REJ09B0327-0400
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