NEC 78K0 User Manual page 114

WR
PU
RD
WR
PORT
WR
PM
PU6: Pull-up resistor option register 6
PM6: Port mode register 6
RD: Read signal
WR××: Write signal
114
CHAPTER 4 PORT FUNCTIONS
Figure 4-17. Block Diagram of P64, P65, and P67
PU6
PU64, PU65, PU67
Selector
Output latch
(P64, P65, P67)
Selector
Alternate
function
PM6
PM64, PM65, PM67
Memory expansion
mode register
(MEM)
User's Manual U15947EJ2V0UD
*
EV
DD
P-ch
P64/RD,
P65/WR,
P67/ASTB