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LC87F7DJ2C Datasheet(PDF) 4 Page - Sanyo Semicon Device

Part # LC87F7DJ2C
Description  FROM 192K byte, RAM 8K byte on-chip 8-bit 1-chip Microcontroller
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC87F7DJ2C Datasheet(HTML) 4 Page - Sanyo Semicon Device

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LC87F7DJ2C
No.A1872-4/26
Interrupts
• 31 sources, 10 vector addresses
1) Provides three levels (low (L), high (H), and highest (X)) of multiplex interrupt control. Any interrupt requests of
the level equal to or lower than the current interrupt are not accepted.
2) When interrupt requests to two or more vector addresses occur at the same time, the interrupt of the highest level
takes precedence over the other interrupts. For interrupts of the same level, the interrupt into the smallest vector
address takes precedence.
No.
Vector Address
Level
Interrupt Source
1
00003H
X or L
INT0
2
0000BH
X or L
INT1
3
00013H
H or L
INT2/T0L/INT4/remote control receiver1
4
0001BH
H or L
INT3/base timer/INT5/remote control receiver2
5
00023H
H or L
T0H/INT6
6
0002BH
H or L
T1L/T1H/INT7
7
00033H
H or L
SIO0/UART1 receive/UART2 receive/T8L/T8H
8
0003BH
H or L
SIO1/UART1 transmit/UART2 transmit
9
00043H
H or L
ADC/MIC/T6/T7/PWM4/PWM5
10
0004BH
H or L
Port 0/T4/T5
• Priority levels X > H > L
• Of interrupts of the same level, the one with the smallest vector address takes precedence.
• IFLG (List of interrupt source flag function)
1) Shows a list of interrupt source flags that caused a branching to a particular vector address
(shown in the diagram above).
Subroutine Stack Levels: 4096 levels (The stack is allocated in RAM.)
High-speed Multiplication/Division Instructions
• 16 bits × 8 bits
(5 tCYC execution time)
• 24 bits × 16 bits
(12 tCYC execution time)
• 16 bits ÷ 8 bits
(8 tCYC execution time)
• 24 bits ÷ 16 bits
(12 tCYC execution time)
Oscillation Circuits
• RC oscillation circuit (internal):
For system clock
• CF oscillation circuit:
For system clock, with internal Rf and external Rd
• Crystal oscillation circuit:
For low-speed system clock, with internal Rf and external Rd
• Frequency variable RC oscillation circuit (internal): For system clock
1) Adjustable in
±4% (typ.) step from a selected center frequency.
2) Measures the frequency of the source oscillation clock using the input signal from XT1 as the reference.
System Clock Divider Function
• Can run on low current.
• The minimum instruction cycle selectable from 300ns, 600ns, 1.2μs, 2.4μs, 4.8μs, 9.6μs, 19.2μs, 38.4μs,
and 76.8
μs (at a main clock rate of 10MHz).
Standby Function
• HALT mode: Halts instruction execution while allowing the peripheral circuits to continue operation.
(Some parts of the serial transfer function stops operation.)
1) Oscillation is not halted automatically.
2) Canceled by a system reset or occurrence of an interrupt
Continued on next page.


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