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LC877816A Fiches technique(PDF) 9 Page - Sanyo Semicon Device

No de pièce LC877816A
Description  CMOS IC 16KB-byte and 512-byte RAM 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) 9 Page - Sanyo Semicon Device

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LC877816A
No.A0635-9/21
Port Output Types
Port form and pull-up resistor options are shown in the following table.
Port status can be read even when port is set to output mode.
Port Name
Option selected in
units of
Option type
Output type
Pull-up resistor
1
CMOS
Programmable(Note 1)
P00 to P07
1 bit
2
Nch-open drain
No
1
CMOS
Programmable
P10 to P17
1 bit
2
Nch-open drain
Programmable
P70
-
No
Nch-open drain
Programmable
P71 to P73
-
No
CMOS
Programmable
1
CMOS,
2
Pch-Open Drain
S16(PC0) to
S23(PC7)
-
3
Nch-Open Drain
No
Note 1: Attachment of Port0 programmable pull-up resistors is controllable in nibble units (P00 to 03, P04 to 07).
*1: Connect as follows to reduce noise on VDD.
VSS1 and VSS2 must be connected together and grounded.
*2: The power supply for the internal memory is VDC. VDD1 and VDD2 are used as the power supply for ports.
When VDD1 and VDD2 are not backed up, the port level does not become “H” even if the port latch is in the “H”
level. Therefore, when VDD1 and VDD2 are not backed up and the port latch is “H” level, the port level is unstable
in the HOLD mode, and the back up time becomes shorter because the through current runs from VDD to GND in
the input buffer. If VDD1 and VDD2 are not backed up, output “L” by the program or pull the port to “L” by the
external circuit in the HOLD mode so that the port level becomes “L” level and unnecessary current consumption is
prevented.
LSI
VDD1
VDD2
VSS2
VSS1
Power
supply
V1
V2
V3
VDC
CUP1
CUP2
Back up capacitors *2


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