UPD78F0138 NEC, UPD78F0138 Datasheet - Page 102

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

4.2.3 Port 2
102
Port 2 is an 8-bit input-only port.
This port can also be used for A/D converter analog input.
Figure 4-11 shows a block diagram of port 2.
RD:
A/D converter
RD
Read signal
Figure 4-11. Block Diagram of P20 to P27
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16228EJ2V0UD
P20/ANI0 to P27/ANI7