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LC877264A 数据表(PDF) 10 Page - Sanyo Semicon Device

部件名 LC877264A
功能描述  8-Bit Single Chip Microcontroller with 64/56/48 KB ROM and 2048-Byte RAM On Chip
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制造商  SANYO [Sanyo Semicon Device]
网页  https://www.sanyo-av.com/us/
标志 SANYO - Sanyo Semicon Device

LC877264A 数据表(HTML) 10 Page - Sanyo Semicon Device

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LC877264A/56A/48A
No.6719-10/24
Port Configuration
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.
Terminal
Option applies to:
Options
Output Form
Pull-up resistor
1
CMOS
Programmable
(Note 1)
P00 to P07
each bit
2
Nch-open drain
None
1
CMOS
Programmable
P10 to P17
each bit
2
Nch-open drain
Programmable
1
CMOS
Programmable
P30 to P35
each bit
2
Nch-open drain
None
P70
None
Nch-open drain
Programmable
P71 to P73
None
CMOS
Programmable
P80 to P87
None
Nch-open drain
None
S0/PA0 to
S47/PF7
None
CMOS
Programmable
COM0/PL0 to
COM3/PL3
None
Input only
None
V1/PL4 to
V3/PL6
None
Input only
None
XT1
None
Input only
None
XT2
None
Output for 32.768kHz crystal
oscillation
None
Note 1 Attachment of Port0 programmable pull-up resistors is controllable in nibble units (P00-03, P04-07).
* Note 1: Connect as follows to reduce noise on VDD.
VSS1, VSS2 and VSS3 must be connected together and grounded.
*Note 2 : The power supply for the internal memory is VDD1 but it uses the VDD3 as the power supply for ports. When the
VDD3 is not backed up, the port level does not become “H” even if the port latch is in the “H” level. Therefore,
when the VDD3 is 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 VDD3 is 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
Back-up capacitors *2
VDD2
VDD3
VSS2
VSS1
Power
supply
VSS3


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