Block Diagram Of P90 To P93; Block Diagram Of P94 To P96 - NEC PD78076 User Manual

RD
WR
PORT
Output Latch
(P90 to P93)
WR
PM
PM90 to PM93
PM : Port mode register
RD : Port 9 read signal
WR : Port 9 write signal
WR
PUO
RD
WR
PORT
Output Latch
(P94 to P96)
WR
PM
PM94 to PM96
PUO : Pull-up resistor option register
PM : Port mode register
RD : Port 9 read signal
WR : Port 9 write signal
152
CHAPTER 6 PORT FUNCTIONS
Figure 6-18. Block Diagram of P90 to P93
Selector
Figure 6-19. Block Diagram of P94 to P96
PUO9
Selector
V
DD
Mask Option Resistor
Mask ROM versions only.
µ PD78P078 and 78P078Y
have no pull-up resistor.
P90 to P93
V
DD
P-ch
P94 to P96