hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 479

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

14.1.3
The pins of the power-on reset circuit and low-voltage detection circuit are listed in table 14.1.
Table 14.1 Pin Description
Pin
Low-voltage detection circuit
reference voltage input pin
Low-voltage detection circuit power
supply drop detection voltage input
pin
Low-voltage detection circuit power
supply rise detection voltage input
pin
14.1.4
The registers of the power-on reset circuit and low-voltage detection circuit are listed in table 14.2.
Table 14.2 Register Descriptions
Name
Low-voltage detection control register
Low-voltage detection status register
Low-voltage detection counter
14.2
14.2.1
Note: * These bits are not initialized by resets trigged by LVDR. They are initialized by power-on
Bit
Initial value
Read/Write
resets and watchdog timer resets.
Pin Description
Register Descriptions
Individual Register Descriptions
Low-Voltage Detection Control Register (LVDCR)
Section 14 Power-On Reset and Low-Voltage Detection Circuits (H8/38124 Group Only)
LVDE
R/W
0 *
7
R/W
—
6
0
VINTDSEL VINTUSEL
Symbol
Vref
extD
extU
R/W
5
0
Symbol
LVDCR
LVDSR
LVDCNT
I/O
Input
Input
Input
R/W
4
0
Rev. 7.00 Mar 10, 2005 page 437 of 652
R/W
R/W
R/W
R
LVDSEL
Function
Reference voltage input for low-
voltage detection circuit
Power supply drop detection voltage
input pin for low-voltage detection
circuit
Power supply rise detection voltage
input pin for low-voltage detection
circuit
R/W
0 *
3
Initial Value
H'00
H'00
H'00
LVDRE
R/W
0 *
2
LVDDE
REJ09B0042-0700
R/W
1
0
Address
H'FF86
H'FF87
H'FFC3
LVDUE
R/W
0
0