UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 128
UPD78F9502MA-CAC-A
Manufacturer Part Number
UPD78F9502MA-CAC-A
Description
8BIT MCU, 4K FLASH, 128B RAM, SMD
Manufacturer
NEC
Datasheet
1.UPD78F9502MA-CAC-A.pdf
(229 pages)
Specifications of UPD78F9502MA-CAC-A
Controller Family/series
UPD78F
No. Of I/o's
8
Ram Memory Size
128Byte
Cpu Speed
10MHz
No. Of Timers
2
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
4KB
Oscillator Type
External, Internal
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(2) When used as interrupt
<1> Mask the LVI interrupt (LVIMK = 1).
<2> Set the detection voltage using bits 3 to 0 (LVIS3 to LVIS0) of the low-voltage detection level select
<3> Set bit 7 (LVION) of LVIM to 1 (enables LVI operation).
<4> Use software to instigate a wait of at least 0.2 ms.
<5> Wait until “supply voltage (V
<6> Clear the interrupt request flag of LVI (LVIIF) to 0.
<7> Release the interrupt mask flag of LVI (LVIMK).
<8> Execute the EI instruction (when vector interrupts are used).
Figure 12-5 shows the timing of generating the interrupt signal of the low-voltage detector. Numbers <1> to
<7> in this figure correspond to <1> to <7> above.
When starting operation
When stopping operation
Either of the following procedures must be executed.
When using 8-bit memory manipulation instruction: Write 00H to LVIM.
When using 1-bit memory manipulation instruction: Clear LVION to 0.
register (LVIS).
CHAPTER 12 LOW-VOLTAGE DETECTOR
Preliminary User’s Manual U18681EJ1V0UD
DD
) ≥ detection voltage (V
LVI
)” at bit 0 (LVIF) of LVIM is confirmed.
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