4502 Datasheet, PDF (6/116 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4502 Group
CONNECTIONS OF UNUSED PINS
Pin
XIN
XOUT
D0, D1
D4, D5
D2/C
D3/K
P00–P03
P10, P11
P12/CNTR
P13/INT
P20/AIN0
P21/AIN1
P30/AIN2
P31/AIN3
Connection
Connect to VSS.
Open.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Open. (Output latch is set to “1.”)
Open. (Output latch is set to “0.”)
Connect to VSS.
Usage condition
System operates by the on-chip oscillator. (Note 1)
System operates by the external clock.
(The ceramic resonator is selected with the CMCK instruction.)
System operates by the RC oscillator.
(The RC oscillation is selected with the CRCK instruction.)
System operates by the on-chip oscillator. (Note 1)
The key-on wakeup function is not selected. (Note 4)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The key-on wakeup function is not selected. (Note 4)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The key-on wakeup function is not selected. (Note 4)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The key-on wakeup function is not selected. The input to INT pin is disabled.
(Notes 4, 5)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The key-on wakeup function is not selected. (Note 4)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
The pull-up function and the key-on wakeup function are not selected. (Notes 2, 3)
Notes 1: When the ceramic resonator or the RC oscillation is not selected by program, system operates by the on-chip oscillator (internal oscillator).
2: When the pull-up function is left valid, the supply current is increased. Do not select the pull-up function.
3: When the key-on wakeup function is left valid, the system returns from the RAM back-up state immediately after going into the RAM back-up state.
Do not select the key-on wakeup function.
4: When selecting the key-on wakeup function, select also the pull-up function.
5: Clear the bit 3 (I13) of register I1 to “0” to disable to input to INT pin (after reset: I13 = “0”)
(Note when connecting to VSS)
q Connect the unused pins to VSS using the thickest wire at the shortest distance against noise.
Rev.3.01 2005.02.02 page 6 of 112
REJ03B0105-0301