DF38602RFT10 Renesas Electronics America, DF38602RFT10 Datasheet - Page 404

• Manufacturer Part Number: DF38602RFT10
• Description: MCU 3V 16K 32-QFN
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H SLPr

Specifications of DF38602RFT10

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 10MHz
• Connectivity: I²C, IrDA, SCI, SSU
• Peripherals: POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F38602RFT10; HD64F38602RFT10

Section 19 Power-On Reset Circuit
19.2
19.2.1
The operation timing of the power-on reset circuit is shown in figure 19.2. As the power supply
voltage rises, the capacitor, which is externally connected to the RES pin, is gradually charged
through the on-chip pull-up resistor (Rp). The low level of the RES pin is sent to the LSI and the
whole LSI is reset. When the level of the RES pin reaches to the predetermined level, a voltage
detection circuit detects it. Then a 3-bit counter starts counting up. When the 3-bit counter counts
φ for 8 times, an overflow signal is generated and an internal reset signal is negated.
The capacitance (C
formula; where the RES rising time is t. For the on-chip resistor (Rp), see section 21, Electrical
Characteristics. The power supply rising time (t_vtr) should be shorter than half the RES rising
time (t). The RES rising time (t) is also should be longer than the oscillation stabilization time
(trc).
Note that the power supply voltage (Vcc) must fall below Vpor = 100 mV and rise after charge on
the RES pin is removed. To remove charge on the RES pin, it is recommended that the diode
should be placed near Vcc. If the power supply voltage (Vcc) rises from the point above Vpor, a
power-on reset may not occur.
Rev. 3.00 May 15, 2007 Page 370 of 516
REJ09B0152-0300
Internal reset
signal
C
Vcc
RES
Operation
RES
Power-On Reset Circuit
=
RES
Figure 19.2 Power-On Reset Circuit Operation Timing
Rp
t
) which is connected to the RES pin can be computed using the following
(t > trc, t > t_vtr × 2)
t_vtr
t_vtr × 2
V_rst
t_cr
t_out (eight states)