Datasheet

16. Programmable I/O Ports
page 229
923fo7002,51.beF00.2.veR
0020-2020B90JER
)T62/C61M,B62/C61M,A62/C61M(puorGA62/C61M
Pin name Connection
Ports P1, P6 to P10
X
OUT
(3)
AV SS , V REF
AV CC
After setting for input mode, connect every pin to V SS via a resistor(pull-down);
or after setting for output mode, leave these pins open.
(1, 2, 4)
Open
Connect to V
CC
Connect to V SS
Connect via resistor to V CC (pull-up)
(5)
X IN
NOTES:
1. When setting the port for output mode and leave it open, be aware that the port remains in input mode until it is
switched to output mode in a program after reset. For this reason, the voltage level on the pin becomes
indeterminate, causing the power supply current to increase while the port remains in input mode. Futhermore,
by considering a possibility that the contents of the direction registers could be changed by noise or noise-
induced runaway, it is recommended that the contents of the direction registers be periodically reset in software,
for the increased reliability of the program.
2. Make sure the unused pins are processed with the shortest possible wiring from the microcomputer pins (within 2
cm).
3. With external clock or VCC input to XIN pin.
4. When using the 48-pin package, set PACR2, PACR1, PACR0 to "100
2 ". When using the 42-pin package, set
PACR2, PACR1, PACR0 to "001
2 ".
5. When the main clock oscillation circuit is not used, set the CM05 bit in the CM0 register to “0” (main clock stops)
to reduce power consumption.
Table 16.1. Unassigned Pin Handling in Single-chip Mode
Figure 16.7. Unassigned Pins Handling
(Input mode)
·
·
·
(Input mode)
(Output mode)
X OUT
AV CC
AV SS
V REF
Microcomputer
V CC
V SS
In single-chip mode
Open
Open
·
·
·
(1)
Port P1, P6 to P10
X IN
NOTE:
1. When using the 48-pin package, set PACR2, PACR1, PACR0 to "100
2".
When using the 42pin-package, set PACR2, PACR1, PACR0 to "001
2".