
Rev.2.10 Apr 14, 2006 page 259 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 20. Programmable I/O Ports
Figure 20.12 Unassigned Pins Handling
NOTES:
1.If the PM07 bit in the PM0 register is set to 1 (BCLK not output), connect this pin to VCC via a resistor (pulled high).
2.The ports P11 to P14 are only in the 128-pin version. When not using all of pins P11 to p14 may be left open by setting
the PU37 bit in the PUR3 register to 0 (P11 to P14 unusable), without causing any problem.
3. Not available in T/V-ver..
Open
MCU
In single-chip mode
Port P0 to P14 (Input mode)
(except for P8_5)
(2)
(Input mode)
(Output mode)
NMI
XOUT
AVCC
BYTE
AVSS
VREF
Open
VCC
VCC
VSS
MCU
Port P4_5/CS1
to P4_7/CS3
In memory expansion mode or
in microprocessor mode
(3)
Port P6 to P14 (Input mode)
(except for P8_5)
(2)
(Input mode)
(Output mode)
NMI
BHE
HLDA
ALE
XOUT
BCLK
(
1)
HOLD
RDY
AVCC
AVSS
VREF
Open
VCC
VCC
VCC
VSS
Open
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