UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 96

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

4.2.7 Port 6
register 6 (PM6). When using port 6, internal pull-up resistors can be connected in 1-bit units by using pull-up resistor
option register 6 (PU6).
94
This is a 4-bit I/O port with output latches. Port 6 can be set in the input or output mode in 1-bit units via port mode
Alternate functions include a control signal output function in the external memory expansion mode.
RESET input sets port 6 to input mode.
Figure 4-9 shows the block diagram of port 6.
Caution P66 can be used as an I/O port pin when no external wait state is used in the external memory
PU: Pull-up resistor option register
PM: Port mode register
RD: Read signal of port 6
WR: Write signal of port 6
WR
WR
WR
expansion mode.
RD
PORT
PU
PM
PM64 to PM67
PU64 to PU67
(P64 to P67)
Output latch
Figure 4-9. Block Diagram of P64 to P67
CHAPTER 4 PORT FUNCTIONS
User’s Manual U13029EJ7V1UD
Selector
V
DD
P-ch
P64/RD,
P65/WR,
P66/WAIT,
P67/ASTB