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LC87FBL08A датащи(PDF) 3 Page - Sanyo Semicon Device

номер детали LC87FBL08A
подробное описание детали  8K-byte FROM and 256-byte RAM integrated 8-bit 1-chip Microcontroller
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производитель  SANYO [Sanyo Semicon Device]
домашняя страница  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

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LC87FBL08A
No.A1955-3/28
Interrupts
• 17 sources, 9 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
4
0001BH
H or L
INT3/INT5/base timer
5
00023H
H or L
T0H
6
0002BH
H or L
T1L/T1H
7
00033H
H or L
None
8
0003BH
H or L
SIO1
9
00043H
H or L
ADC/T6/T7/PWM4, PWM5
10
0004BH
H or L
Port 0
• Priority levels X > H > L
• Of interrupts of the same level, the one with the smallest vector address takes precedence.
Subroutine Stack Levels: 128levels (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
• Internal oscillation circuits
Low-speed RC oscillation circuit :
For system clock (100kHz)
Medium-speed RC oscillation circuit :
For system clock (1MHz)
Frequency variable RC oscillation circuit :
For system clock (8MHz)
• External oscillation circuits
Hi-speed CF oscillation circuit:
For system clock, with internal Rf
Low speed crystal oscillation circuit:
For low-speed system clock, with internal Rf
1) The CF and crystal oscillation circuits share the same pins. The active circuit is selected under program control.
2) Both the CF and crystal oscillator circuits stop operation on a system reset. After reset is released, oscillation
is stopped so start the oscillation operation by program.
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).
Internal Reset Function
• Power-on reset (POR) function
1) POR reset is generated only at power-on time.
2) The POR release level can be selected from 4 levels (2.57V, 2.87V, 3.86V, and 4.35V) through option
configuration.
• Low-voltage detection reset (LVD) function
1) LVD and POR functions are combined to generate resets when power is turned on and when power voltage falls
below a certain level.
2) The use or disuse of the LVD function and the low voltage threshold level (3 levels: 2.81V, 3.79V, 4.28V) can be
selected by optional configuration.


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