Technical information

2-4
3800 GROUP USER’S MANUAL
APPLICATION
2.1 I/O port
P30, P31
P4, P5, P6, P7
ONW
RESET
OUT
φ
SYNC
X
OUT
• Set to the input mode and connect to VCC or VSS through a
resistor of 1 k to 10 k .
• Set to the output mode and open at “L” or “H.”
Open (only when using external clock).
Handling
2.1.3 Handling of unused pins
Table 2.1.1 Handling of unused pins (in single-chip mode)
Name of Pins/Ports
P0, P1, P2, P3, P4, P5, P6, P7
XOUT
Name of Pins/Ports Handling
Table 2.1.2 Handling of unused pins (in memory expansion mode and microprocessor mode)
Open
• Set to the input mode and connect to VCC or VSS through a
resistor of 1 k to 10 k .
• Set to the output mode and open at “L” or “H.”
Connect to VCC through a resistor of 1 k to 10 k .
Open
Open
Open
Open (only when using external clock).