LC87F2H08A Datasheet, PDF (3/27 Pages) Sanyo Semicon Device – CMOS IC 8K-byte FROM and 256-byte RAM integrated 8-bit 1-chip Microcontroller

LC87F2H08A
„PWM: Multifrequency 12-bit PWM × 2 channels
„Remote Control Receiver Circuit (sharing pins with P73, INT3, and T0IN)
• Noise rejection function (noise filter time constant selectable from 1 tCYC/32 tCYC/128 tCYC)
„Clock Output Function
• Can generate clock outputs with a frequency of 1/1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 of the source clock selected as
the system clock.
• Can generate the source clock for the subclock
„Watchdog Timer
• External RC watchdog timer
• Interrupt and reset signals selectable
„Interrupts
• 20 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
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
SIO0/UART1 receive
8
0003BH
H or L
SIO1/UART1 transmit
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)
Multifrequency 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. When the reset is released, only the
CF oscillation circuit resumes operation.
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