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455A Datasheet(PDF) 7 Page - Renesas Technology Corp

Part # 455A
Description  SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PDF  148 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

455A Datasheet(HTML) 7 Page - Renesas Technology Corp

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Rev.1.01
Feb 15, 2008
Page 7 of 146
REJ03B0224-0101
455A Group
CONNECTIONS OF UNUSED PINS
(Note when connecting to VSS or VDD)
Connect the unused pins to VSS using the thickest wire at the shortest distance against noise.
Table 6
Port function
Pin
Connection
Usage condition
XIN
Connect to VSS.
−
XOUT
Open.
−
XCIN/D6
Connect to VSS.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
XCOUT/D7
Open.
The key-on wakeup function is invalid.
D0
−D4
Open.
The key-on wakeup function is invalid.
Connect to VSS.
N-channel open-drain is selected for the output structure.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
D5/INT
Open.
INT pin input is disabled.
The key-on wakeup function is invalid.
Connect to VSS.
N-channel open-drain is selected for the output structure.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
C/CNTR
Open.
CNTR input is not selected for timer 1 count source.
P00
/SEG16−
P03
/SEG19
Open.
The key-on wakeup function is invalid.
Connect to VSS.
Segment output is not selected.
N-channel open-drain is selected for the output structure.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
P10
/SEG20−
P13
/SEG23
Open.
The key-on wakeup function is invalid.
Connect to VSS.
Segment output is not selected.
N-channel open-drain is selected for the output structure.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
P20
/SEG24−
P23
/SEG27
Open.
The key-on wakeup function is invalid.
Connect to VSS.
Segment output is not selected.
N-channel open-drain is selected for the output structure.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
P30
/SEG28−
P33
/SEG31
Open.
The key-on wakeup function is invalid.
Connect to VSS.
Segment output is not selected.
N-channel open-drain is selected for the output structure.
Pull-up transistor is OFF.
The key-on wakeup function is invalid.
COM0–COM3
Open.
−
SEG0/VLC3
Open.
SEG0 pin is selected.
SEG1/VLC2
Open.
SEG1 pin is selected.
SEG2/VLC1
Open.
SEG2 pin is selected.
SEG3–SEG15
Open.
−



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