CHAPTER 5 PORT FUNCTIONS
User’s Manual U15109EJ3V0UD
146
(3) Block diagram (port 1)
Figure 5-2. Block Diagram of P10 and P12
WR
PM
WR
PF
WR
PORT
RD
V
DD
Selector
PF1n
PF1
PM1n
PM1
P-ch
N-ch
Internal bus
Output latch
(P1n)
Alternate function
P10/SI0/SDA0
P12/SCK0/SCL0
Remarks 1.
PF1:
Port 1 function register
PM1: Port 1 mode register
RD:
Port 1 read signal
WR:
Port 1 write signal
2.
n = 0, 2