4509 Datasheet, PDF (7/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 Group
CONNECTIONS OF UNUSED PINS
Pin
Connection
Usage condition
XIN
Connect to VSS.
RC oscillation circuit is not selected. (CRCK instruction is not executed.)
XOUT
Open.
D0, D1, D4, D5
Open.
Connect to VSS.
N-channel open-drain is selected for the output structure (FR30, FR31, C12, C13 = “0”).
D2/AIN4, D3/AIN5
Open.
The key-on wakeup function is invalid (K22, K23 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR32, FR33 = “0”).
Pull-up transistor is OFF (PU22, PU23 = “0”).
The key-on wakeup function is invalid (K22, K23 = “0”).
P00/SIN
Open.
SIN pin is not selected (J11 = “0”).
The key-on wakeup function is invalid (K00 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR00 = “0”).
Pull-up transistor is OFF (PU00 = “0”).
The key-on wakeup function is invalid (K00 = “0”).
P01/SOUT
Open.
The key-on wakeup function is invalid (K01 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR01 = “0”).
Pull-up transistor is OFF (PU01 = “0”).
The key-on wakeup function is invalid (K01 = “0”).
P02/SCK
Open.
SCK pin is not selected (J11J10 = “00”).
The key-on wakeup function is invalid (K02 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR02 = “0”).
Pull-up transistor is OFF (PU02 = “0”).
The key-on wakeup function is invalid (K02 = “0”).
P03
Open.
The key-on wakeup function is invalid (K03 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR03 = “0”).
Pull-up transistor is OFF (PU03 = “0”).
The key-on wakeup function is invalid (K03 = “0”).
P10
Open.
The key-on wakeup function is invalid (K10 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR10 = “0”).
Pull-up transistor is OFF (PU10 = “0”).
P11/CNTR1
Open.
The key-on wakeup function is invalid (K10 = “0”).
CNTR1 input is not selected for the timer 1 count source (W11, W10 ≠ “10”).
The key-on wakeup function is invalid (K11 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR11 = “0”).
Pull-up transistor is OFF (PU11 = “0”).
P12/CNTR0
Open.
The key-on wakeup function is invalid (K11 = “0”).
CNTR0 input is not selected for the timer 2 count source (W21, W20 ≠ “10”).
The key-on wakeup function is invalid (K12 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR12 = “0”).
Pull-up transistor is OFF (PU12 = “0”).
The key-on wakeup function is invalid (K12 = “0”).
P13/INT
Open.
INT pin input is disabled (I13 = “0”).
The key-on wakeup function is invalid (K13 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR13 = “0”).
Pull-up transistor is OFF (PU13 = “0”).
The key-on wakeup function is invalid (K13 = “0”).
P20/AIN0, P21/AIN1 Open.
The key-on wakeup function is invalid (K20, K21 = “0”).
Connect to VSS.
N-channel open-drain is selected for the output structure (FR20, FR21 = “0”).
Pull-up transistor is OFF (PU20, PU21 = “0”).
The key-on wakeup function is invalid (K20, K21 = “0”).
P30/AIN2, P31/AIN3 Open.
Connect to VSS.
N-channel open-drain is selected for the output structure (C11, C10 = “0”).
(Note when connecting to VSS or VDD)
q Connect the unused pins to VSS using the thickest wire at the shortest distance against noise.
Rev.1.02 2006.12.22 page 7 of 140
REJ03B0147-0102