HD64F3687GFP Renesas Electronics America, HD64F3687GFP Datasheet - Page 401
![IC H8 MCU FLASH 56K 64-LQFP](/photos/28/61/286107/64-lqfp__plqp0064kc-a_sml.jpg)
HD64F3687GFP
Manufacturer Part Number
HD64F3687GFP
Description
IC H8 MCU FLASH 56K 64-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.HD64F3684GFPV.pdf
(538 pages)
Specifications of HD64F3687GFP
Core Processor
H8/300H
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
45
Program Memory Size
56KB (56K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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LVDI (Interrupt by Low Voltage Detect) Circuit:
Figure 20.4 shows the timing of LVDI functions. The LVDI enters the module-standby state after
a power-on reset is canceled. To operate the LVDI, set the LVDE bit in LVDCR to 1, wait for 50
by a software timer, etc., then set the LVDDE and LVDUE bits in LVDCR to 1. After that, the
output settings of ports must be made. To cancel the low-voltage detection circuit, first the
LVDDE and LVDUE bits should all be cleared to 0 and then the LVDE bit should be cleared to 0.
The LVDE bit must not be cleared to 0 at the same timing as the LVDDE and LVDUE bits
because incorrect operation may occur.
When the power-supply voltage falls below Vint (D) (typ. = 3.7 V) voltage, the LVDI clears the
LVDINT signal to 0 and the LVDDF bit in LVDSR is set to 1. If the LVDDE bit is 1 at this time,
an IRQ0 interrupt request is simultaneously generated. In this case, the necessary data must be
saved in the external EEPROM, etc, and a transition must be made to standby mode or subsleep
mode. Until this processing is completed, the power supply voltage must be higher than the lower
limit of the guaranteed operating voltage.
When the power-supply voltage does not fall below Vreset1 (typ. = 2.3 V) voltage but rises above
Vint (U) (typ. = 4.0 V) voltage, the LVDI sets the LVDINT signal to 1. If the LVDUE bit is 1 at
s (t
LVDON
V
LVDRES
V
PSS-reset
signal
OVF
Internal reset
signal
LVDRmin
) until the reference voltage and the low-voltage-detection power supply have stabilized
CC
Figure 20.3 Operational Timing of LVDR Circuit
Section 20 Power-On Reset and Low-Voltage Detection Circuits (Optional)
PSS counter starts
131,072 cycles
Reset released
Rev.5.00 Nov. 02, 2005 Page 367 of 500
REJ09B0027-0500
Vreset
V
SS
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