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LC877816A Fiches technique(PDF) 4 Page - Sanyo Semicon Device

No de pièce LC877816A
Description  8-bit 1-chip Microcontroller
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC877816A Fiches technique(HTML) 4 Page - Sanyo Semicon Device

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LC877816A/12A/08A
No.A0635-4/21
Oscillation Circuits
• On-chip RC oscillation for system clock use.
• CF oscillation (4MHz) for system clock use. (Rf built in)
• Crystal oscillation (32.768kHz) low speed system clock use. (Rf built in)
System Clock Divider Function
• Low power consumption operation is available
• Minimum instruction cycle time (0.75μs, 1.5μs, 3μs, 6μs, 12μs, 24μs, 48μs, 96μs, 192μs can be switched by
program (when using 4MHz main clock)
Standby Function
• HALT mode: HALT mode is used to reduce power consumption. During the HALT mode, program execution is
stopped but peripheral circuits keep operating (some parts of serial transfer operation stop.)
1) Oscillation circuits are not stopped automatically.
2) Released by the system reset or interrupts.
• HOLD mode: HOLD mode is used to reduce power consumption. Program execution and peripheral circuits are
stopped.
1) CF, RC and crystal oscillation circuits stop automatically.
2) Released by any of the following conditions.
(1) Low level input to the reset pin
(2) Specified level input to one of INT0, INT1, INT2
(3) Port 0 interrupt
• X'tal HOLD mode: X’tal HOLD mode is used to reduce power consumption. Program execution is stopped.
All peripheral circuits except the base timer are stopped.
1) CF and RC oscillation circuits stop automatically.
2) Crystal oscillator operation is kept in its state at HOLD mode inception.
3) Released by any of the following conditions
(1) Low level input to the reset pin
(2) Specified level input to one of INT0, INT1, INT2
(3) Port 0 interrupt
(4) Base-timer interrupt
Development Tools
• On chip debugger (LC87F7032A)
LC87F7032A and LC877816A differ in following points.
When LC87F7032A is power save mode, Current consumption doesn’t decrease.
When LC87F7032A is power save mode, X’tal voltage level doesn’t change.
LC87F7032A has P2 registers (P2, P2DDR). But, LC877816A doesn’t have them.
Package Form
• ΤQFP64J(7×7): Lead-free type
• QIP64E(14×14): Lead-free type


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