UPD78F0138 NEC, UPD78F0138 Datasheet - Page 110

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

4.2.10 Port 13
110
Port 13 is a 1-bit output-only port.
Figure 4-19 shows a block diagram of port 13.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level immediately after
RD:
WR××: Write signal
reset is released, the output signal of P130 can be dummy-output as the reset signal to the CPU.
WR
RD
Read signal
PORT
Output latch
(P130)
Figure 4-19. Block Diagram of P130
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16228EJ2V0UD
P130