M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 463

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

Programmable I/O Ports
448
Table 2.15.3. Examples of working on unused pins in memory expansion mode or microprocessor mode
Note 3:
Note 4:
Note 5:
Note 6:
Note 1:
Note 2:
BHE, ALE, HLDA
X
AV
AV
Ports P6 to P10 (excluding P8
HOLD, RDY, NMI
OUT
CC
SS
(b) Memory expansion mode, microprocessor mode
, V
(Note 4), BCLK (Note 6)
REF
If setting these pins in output mode and opening them, ports are in input mode until switched into
output mode by use of software after reset. Thus the voltage levels of the pins become unstable,
and there can be instances in which the power source current increases while the ports are in
input mode.
In view of an instance in which the contents of the direction registers change due to a runaway
generated by noise or other causes, setting the contents of the direction registers periodically by
use of software increases program reliability.
Make wiring as short as possible (not more than 2 cm from the microcomputer's pins) in working
on non-used pins.
When a V
mode is switched by use of software after reset. Thus the voltage levels of the pins destabilize,
and there can be an increase in the power source current while these pins are input ports.
When an external clock is input to the X
Output "L" if port P7
Port P7
When the BCLK output disable bit (bit 7 at address 0004
resistor (pull-up).
Pin name
0
and P7
SS
level is connected to the CNV
1
are N channel open drain.
0
and P7
5
) After setting for input mode, connect every pin to V
resistor; or after setting for output mode, leave these pins open.
(Note 1, Note 2, Note 5)
Connect to V
Open (Note 3)
Open
Connect via resistor to V
Connect to V
1
are set to output mode.
CC
SS
IN
pin.
SS
pin, these pins are input ports until the processor
CC
(pull-up)
Connection
16
) is set to “1”, connect to V
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
SS
Mitsubishi microcomputers
or V
M16C / 62 Group
CC
CC
via a
via a