LC866548 Datasheet, PDF (9/21 Pages) Sanyo Semicon Device – 8-Bit Single Chip Microcontroller

LC866548/40/32/28/24A
Pin Name
XT2/P75
CF1
CF2
I/O
Function Description
O •Output pin for 32.768kHz crystal oscillation
•Other function
P75 for input port
•In case of non use,
At using as oscillator, should be left opened.
At using as a port, connect to VDD1.
I Input pin for ceramic resonator oscillation
O Output pin for ceramic resonator oscillation
Option
* All of port options (except pull-up resistor of port 0) can be specified in bit unit.
* A state of pins at reset
Pin name
Port 0
Ports 1, 3
Input/output mode
Input
Input
A state of pull-up resistor specified at pull-up option
Fixed pull-up resistor OFF
Programmable pull-up resistor OFF
S0/T0 to S15/T15
S16 to S51
P channel Transistor OFF
P channel Transistor OFF
*1 Connect like the following figure to reduce noise into a VDD1 terminal.
• Shorted the VSS1 terminal to the VSS2 terminal and to make the back-up time long.
Power
Supply
Back-up capacitor
LSI
VDD1
VDD2
VDD3
VDD4
VSS1
VFD
powers
VSS2
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