UPD70F3737GF-GAS-AX Renesas Electronics America, UPD70F3737GF-GAS-AX Datasheet - Page 885
UPD70F3737GF-GAS-AX
Manufacturer Part Number
UPD70F3737GF-GAS-AX
Description
MCU 32BIT V850ES/JX3-L 100-LQFP
Manufacturer
Renesas Electronics America
Series
V850ES/Jx3-Lr
Datasheet
1.UPD70F3737GF-GAS-AX.pdf
(1071 pages)
Specifications of UPD70F3737GF-GAS-AX
Core Processor
RISC
Core Size
32-Bit
Speed
20MHz
Connectivity
CSI, EBI/EMI, I²C, UART/USART
Peripherals
DMA, LVD, PWM, WDT
Number Of I /o
84
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 3.6 V
Data Converters
A/D 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD70F3737GF-GAS-AX
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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26.3 Registers
The low-voltage detector is controlled by the following registers.
• Low voltage detection register (LVIM)
• Low voltage detection level select register (LVIS)
(1) Low voltage detection register (LVIM)
The LVIM register is a special register. This can be written only in a combination of specific sequences (see
3.4.7 Special registers).
The LVIM register is used to enable or disable low voltage detection, and to set the operation mode of the low-
voltage detector.
This register can be read or written in 8-bit or 1-bit units. However, the LVIF bit is read-only.
After reset: Note 1
LVIM
Notes 1. Reset by low-voltage detection: 82H
Cautions 1. When the LVION and LVIMD bits are set to 1, the low-voltage detector cannot be
2. Do not change the LVION bit from 1 to 0 while the supply voltage (V
3. After the LVI operation has started (LVION bit = 1), check the LVIF bit.
4. When the INTLVI signal is generated, check the LVIF bit to see whether the supply voltage
LVIF
LVION
LVION
LVIMD
2. When the LVION bit is set to 1, the comparator in the LVI circuit starts operating.
3. Be sure to set bits 6 to 2 to “0”.
<7>
Reset due to other source:
detection voltage (V
has fallen below or exceeds the detection voltage.
Notes 2, 3, 4
0
1
0
1
0
1
Wait at least 0.2 ms, set by software, before checking the voltage by using the
LVIF bit after the LVION bit is set.
stopped until a reset request due to other than low-voltage detection is
generated.
Disable operation.
Enable operation.
Generate interrupt request signal INTLVI when supply voltage drops below or
rises above detection voltage.
Generate internal reset signal LVIRES when supply voltage drops below detection
voltage.
Supply voltage rises above detection voltage, or operation is disabled.
Supply voltage of connected power supply is lower than detection voltage.
CHAPTER 26 LOW-VOLTAGE DETECTOR (LVI)
R/W
6
0
Address: FFFFF890H
LVI
User’s Manual U18953EJ5V0UD
Selection of operation mode of low-voltage detector
) (LVIM.LVIF bit = 1).
5
0
Low voltage detection enable or disable
00H
Low voltage detection flag
4
0
3
0
0
2
LVIMD
<1>
DD
) is lower than the
LVIF
<0>
883
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