LC875932A Datasheet, PDF (11/23 Pages) Sanyo Semicon Device – CMOS IC Internal 32K/24K/16K-byte ROM and 1024-byte RAM 8-bit 1-chip Microcontroller

LC875932A/24A/16A
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 Name
P00 to P07
Option Selected
in Units of
1 bit
Option Type
1
CMOS
Output Type
Pull-up Resistor
Programmable (Note 1)
2
Nch-open drain
No
P10 to P17
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
P20 to P27
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
P70
-
No
Nch-open drain
Programmable
P71 to P73
-
No
CMOS
Programmable
P80 to P86
-
No
Nch-open drain
No
PWM2, PWM3
-
No
CMOS
No
PB0 to PB7
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
PC0 to PC7
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
XT1
-
No
Input for 32.768 kHz crystal oscillator
No
(Input only)
XT2
-
No
Output for 32.768kHz crystal oscillator
No
(Nch-open drain when in general-purpose
output mode)
Note 1: Programmable pull-up resistors for port 0 are controlled in 4-bit units (P00 to 03, P04 to 07).
*1: Connect the IC as shown below to minimize the noise input to the VDD1 pin.
Be sure to electrically short the VSS1, VSS2, and VSS3 pins.
Power
supply
For backup *2
LSI
VDD1
VDD2
VDD3
VSS1 VSS2 VSS3
*2: The internal memory is sustained by VDD1. If none of VDD2 and VDD3 are backed up, the high level output at the
ports are unstable in the HOLD backup mode, allowing through current to flow into the input buffer and thus
shortening the backup time.
Make sure that the port outputs are held at the low level in the HOLD backup mode.
No.A0125-11/23