NEC 78K0 Series User Manual page 101

Function Name I/O
P120 I/O
P121
P122
P123
P124
P130 Output
P140 I/O
P141
µ
Note PD78F0537D only
5.2 Port Configuration
Ports include the following hardware.
Item
Control registers
Port
Pull-up resistor
CHAPTER 5 PORT FUNCTIONS
Table 5-2. Port Functions (2/2)
Function
Port 12.
5-bit I/O port.
Input/output can be specified in 1-bit units.
Only for P120, use of an on-chip pull-up resistor can be
specified by a software setting.
Port 13.
1-bit output-only port.
Port 14.
2-bit I/O port.
Input/output can be specified in 1-bit units.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Table 5-3. Port Configuration
Port mode register (PM0 to PM7, PM12, PM14)
Port register (P0 to P7, P12 to P14)
Pull-up resistor option register (PU0, PU1, PU3 to PU7, PU12, PU14)
A/D port configuration register (ADPC)
Total: 55 (CMOS I/O: 50, CMOS output: 1, N-ch open drain I/O: 4)
Total: 38
Preliminary User's Manual U17260EJ3V1UD
After Reset
Input port
Output port
Input port
Configuration
Alternate Function
INTP0/EXLVI
Note
X1/OCD0A
Note
X2/EXCLK/OCD0B
XT1
XT2/EXCLKS
−
PCL/INTP6
BUZ/INTP7
101