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CHAPTER 4 PORT FUNCTIONS
User’s Manual U15798EJ2V0UD
Figure 4-8. Block Diagram of P30, P31
(a)
µ
PD780344, 780354 Subseries
RD
Internal bus
P30, P31
WR
PORT
WR
PM
Output latch
(P30, P31)
PM30, PM31
Selector
V
DD0
Mask option resistor
Mask ROM version only.
No pull-up resistor for
flash memory version.
(b)
µ
PD780344Y, 780354Y Subseries
Internal bus
P30/SCL0,
P31/SDA0
RD
WR
PORT
WR
PM
Alternate
function
Output latch
(P30, P31)
PM30, PM31
Selector
Alternate
function
PU: Pull-up resistor option register
PM: Port mode register
RD: Port 3 read signal
WR: Port 3 write signal
Содержание mPD780344 Series
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