UPD78F1146AGB-GAH-AX Renesas Electronics America, UPD78F1146AGB-GAH-AX Datasheet - Page 647
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UPD78F1146AGB-GAH-AX
Manufacturer Part Number
UPD78F1146AGB-GAH-AX
Description
MCU 16BIT 78K0R/KX3 64-LQFP
Manufacturer
Renesas Electronics America
Series
78K0R/Kx3r
Datasheet
1.UPD78F1142AGA-HAB-AX.pdf
(880 pages)
Specifications of UPD78F1146AGB-GAH-AX
Core Processor
78K/0R
Core Size
16-Bit
Speed
20MHz
Connectivity
3-Wire SIO, I²C, LIN, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
12K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Company:
Part Number:
UPD78F1146AGB-GAH-AX
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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(b) When LVI Default Start Function Enabled Is Set (Option Byte: LVIOFF = 0)
Cautions 1. Even when the LVI default start function is used, if it is set to LVI operation prohibition by
• When starting operation
• When stopping operation
Figure 20-9 shows the timing of the interrupt signal generated by the low-voltage detector. The numbers in
this timing chart correspond to <1> to <3> above.
Either of the following procedures must be executed.
•
•
<1>
<2>
<3>
<4>
Write 00H to LVIM.
Clear LVION to 0.
When using 8-bit memory manipulation instruction:
When using 1-bit memory manipulation instruction:
value).
2. When the LVI default start function (bit 0 (LVIOFF) of 000C1H = 0) is used, the LVIRF flag
Start in the following initial setting state.
Release the interrupt mask flag of LVI (LVIMK).
Execute the EI instruction (when vector interrupts are used).
Clear bit 1 (LVIMD) of LVIM to 0 (generates interrupt signal when the level is detected) (default
•
•
•
•
•
For details of RESF, see CHAPTER 18 RESET FUNCTION.
the software, it operates as follows:
may become 1 from the beginning due to the power-on waveform.
Set bit 7 (LVION) of LVIM to 1 (enables LVI operation)
Set bit 1 (LVIMD) of LVIM to 1 (generates reset when the level is detected)
Set the low-voltage detection level selection register (LVIS) to 0EH (default value: V
Clear bit 2 (LVISEL) of the low-voltage detection register (LVIM) to 0 (detects level of supply
Set bit 0 (LVIF) of LVIM to 0 (Detects falling edge “Supply voltage (V
voltage (V
±0.1 V ).
(V
• If a reset is generated while LVION = 0, LVION will be re-set to 1 when the CPU starts
• Does not perform low-voltage detection during LVION = 0.
LVI
This is due to the fact that while the pulse width detected by LVI must be 200
LVION = 1 is set upon reset occurrence, and the CPU starts operating without waiting
for the LVI stabilization time.
after reset release. There is a period when low-voltage detection cannot be performed
normally, however, when a reset occurs due to WDT and illegal instruction execution.
)”)
DD
))
CHAPTER 20 LOW-VOLTAGE DETECTOR
User’s Manual U17854EJ9V0UD
DD
) ≥ detection voltage
LVI
μ
= 2.07 V
s max.,
645
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