NEC PD78214 - Manual (Page 115)

86
µ
PD78214 Sub-Series
Fig. 5-35 Block Diagram of P64 and P65 (Port 6)
Internal bus
P64
(P65)
V
DD
RD
IN
Selector
RD
PUO
WR PUO Pull-up resistor option register
PUO6
Port 6 mode register
P64
(P65)
WR PM64, PM65
Output latch
PM64
(PM65)
WR
P64, P65
EA
External extended mode
RD signal (WR signal)
RD OUT