LC87F5NC8A Datasheet, PDF (10/25 Pages) Sanyo Semicon Device – CMOS IC FROM 128K byte, RAM 4096 byte on-chip 8-bit 1-chip Microcontroller

LC87F5NC8A
Port Output Types
The table below lists the types of port outputs and the presence/absence of a pull-up resistor.
Data can be read into any input port even if it is in the output mode.
Port
P00 to P07
Options Selected
in Units of
1 bit
Option Type
1
CMOS
Output Type
Pull-up Resistor
Programmable (Note 1)
2
N-channel open drain
No
P10 to P17
1 bit
1
CMOS
Programmable
2
N-channel open drain
Programmable
P20 to P27
1 bit
1
CMOS
Programmable
2
N-channel open drain
Programmable
P30 to P36
1 bit
1
CMOS
Programmable
2
N-channel open drain
Programmable
P70
-
No
N-channel open drain
Programmable
P71 to P73
-
No
CMOS
Programmable
P80 to P87
-
No
N-channel open drain
No
PA0 to PA5
1 bit
1
CMOS
Programmable
2
N-channel open drain
Programmable
PB0 to PB7
1 bit
1
CMOS
Programmable
2
N-channel open drain
Programmable
PC0 to PC7
1 bit
1
CMOS
Programmable
2
N-channel open drain
Programmable
PE0 to PE7
-
No
CMOS
Programmable
PF0 to PF7
-
No
CMOS
Programmable
SI2P0, SI2P2
-
SI2P3
SI2P1
-
PWM0, PWM1
-
No
CMOS
No
No
CMOS (when selected as ordinary port)
No
N-channel open drain (When SIO2 data is selected)
No
CMOS
No
XT1
-
No
Input only
No
XT2
-
No
Output for 32.768kHz quartz oscillator
No
N-channel open drain (when in general-purpose No
output mode)
Note 1: Programmable pull-up resistors for port 0 are controlled in 4-bit units (P00 to 03, P04 to 07).
*1: Make the following connection to minimize the noise input to the VDD1 pin and prolong the backup time.
Be sure to electrically short the VSS1, VSS2, VSS3 and VSS4 pins.
(Example 1) When backup is active in the HOLD mode, the high level of the port outputs is supplied by the
backup capacitors.
Power
Supply
Back-up
capacitor
LSI
VDD1
VDD2
VDD3
VDD4
VSS1 VSS2 VSS3 VSS4
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