HD64F36077GHV Renesas Electronics America, HD64F36077GHV Datasheet - Page 412

• Manufacturer Part Number: HD64F36077GHV
• Description: 16BIT MCU FLASH 56K, SMD, LQFP64
• Manufacturer: Renesas Electronics America

Specifications of HD64F36077GHV

• No. Of I/o's: 47
• Ram Memory Size: 4KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Supply Voltage Range: 4.5V
• Core Size: 16bit
• Program Memory Size: 56KB
• Oscillator Type: External Only
• Controller Family/series: H8/300H
• Peripherals: ADC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Section 19 Band-Gap Circuit, Power-On Reset, and Low-Voltage Detection Circuits
19.3.3
The source of a reset can be decided by reading the reset source decision register (LVDRF) in the
reset exception handler (see table 19.2). After that, writing 0 to the bit can clear the flag and can be
ready to decide the next reset source.
Figure 19.7 shows a timing of setting the bits in the register.
Table 19.2 Deciding Reset Source
Rev. 1.00 Sep. 16, 2005 Page 382 of 490
REJ09B0216-0100
PRST
1
0
0
Power supply voltage
Internal reset signal
WRST bit
Deciding Reset Source
PRST bit
Figure 19.7 Timing of Setting Bits in Reset Source Decision Register
LVDRF
WRST
0
0
1
Set by
power-on reset
Read and
cleared
(0 is written)
Reset Source
Power-on reset or LVDR occurred
Reset signal input on external reset pin
WDT reset occurred
Set by temporary drop of
power supply voltage
Read and
cleared
(0 is written)
Set by
WDT reset
Read and
cleared
(0 is written)