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UPD780138 Datasheet(PDF) 92 Page - NEC

No. de Pieza. UPD780138
Descripción  8-Bit Single-Chip Microcontrollers
Descarga  558 Pages
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Fabricante  NEC [NEC]
Página de inicio  http://www.nec.com/
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UPD780138 Datasheet(HTML) 92 Page - NEC

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CHAPTER 4 PORT FUNCTIONS
User’s Manual U16228EJ2V0UD
92
Table 4-2. Port Functions (2/2)
Pin Name
I/O
Function
After Reset
Alternate Function
P120
I/O
Port 12.
1-bit I/O port.
Use of an on-chip pull-up resistor can be specified by a
software setting.
Input
INTP0
P130
Output
Port 13.
1-bit output-only port.
Output
P140
PCL/INTP6
P141
I/O
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.
Input
BUZ/INTP7
4.2 Port Configuration
Ports include the following hardware.
Table 4-3. Port Configuration
Item
Configuration
Control registers
Port mode register (PM0, PM1, PM3 to PM7, PM12, PM14)
Port register (P0 to P7, P12 to P14)
Pull-up resistor option register (PU0, PU1, PU3 to PU5, PU7, PU12, PU14)
Port
Total: 51 (CMOS I/O: 38, CMOS input: 8, CMOS output: 1, N-ch open drain I/O: 4)
Pull-up resistor
• Mask ROM version
Total: 42 (software control: 38, mask option specification: 4)
• Flash memory version: Total: 38


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