CHAPTER 14 PORT FUNCTION
User’s Manual U13850EJ4V0UM
387
(3) Block diagram (Port 2)
Figure 14-17. Block Diagram of P20 to P22, P24, and P25
P-ch
WR
PM
WR
PF
WR
PORT
RD
WR
PU
V
DD
V
DD
Selector
PF2n
PF2
PM2n
PM2
PU2n
PU2
P-ch
N-ch
Internal bus
Output latch
(P2n)
Alternate function
P20/SI2/SDA1
Note
P21/SO2
P22/SCK2/SCL1
Note
P24/SO3/TxD1
P25/SCK3/ASCK1
Note
The SDA1, SCL1 pins apply only to the
µ
PD70303xAY and 70F303wAY.
Remarks 1.
PU2: Pull-up resistor option register 2
PF2: Port 2 function register
PM2: Port 2 mode register
RD:
Port 2 read signal
WR:
Port 2 write signal
2.
n = 0 to 2, 4, 5
Содержание MPD703030A
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