DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 440

MCU 5V 128K I-TEMP,PB-FREE, 100-

DF2148RTE20IV

Manufacturer Part Number
DF2148RTE20IV
Description
MCU 5V 128K I-TEMP,PB-FREE, 100-
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Datasheets

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
-
Section 13 Timer Connection
13.3.3
The timer connection facility, TMR1, and the free-running timer (FRT) can be used to measure the
period of an IHI signal divided waveform. Since TMR1 can be cleared by a rising edge of inverted
IVI signal, the rise and fall of the IHI signal divided waveform can be virtually synchronized with
the IVI signal. This enables period measurement to be carried out efficiently.
To measure the period of an IHI signal divided waveform, TCNT in TMR1 is set to count the
external clock (IHI signal) pulses and to be cleared on the rising edge of the external reset signal
(inverted IVI signal). The value to be used as the division factor is written in TCORA, and the
TMO output method is specified by the OS bits in TCSR. Examples of TCR and TCSR settings
are shown in table 13.5, and the timing chart for measurement of the IVI signal and IHI signal
divided waveform periods is shown in figure 13.5. The period of the IHI signal divided waveform
is given by (ICRD(3) – ICRD(2))
Rev. 4.00 Sep 27, 2006 page 394 of 1130
REJ09B0327-0400
TICR+TCORC
Figure 13.3 Timing Chart for Clamp Waveform Generation (CL1 and CL2 Signals)
IHI signal
CL1 signal
CL2 signal
TCNT
TCORA
IHI signal
CL3 signal
TCNT
TICR
Figure 13.4 Timing Chart for Clamp Waveform Generation (CL3 Signal)
Measurement of 8-Bit Timer Divided Waveform Period
the resolution.

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