CHAPTER 14 PORT FUNCTION
User’s Manual U13850EJ4V0UM
382
(c) Port 1 function register (PF1)
PF1 can be read/written in 8-/1-bit units.
Figure 14-10. Port 1 Function Register (PF1)
After reset: 00H
R/W
Address: FFFFF0A2H
7
6
5
4
3
2
1
0
PF1
0
0
PF15
PF14
0
Note
PF12
PF11
PF10
PF1n
Control of normal output/N-ch open-drain output (n = 0 to 2, 4, 5)
0
Normal output
1
N-ch open-drain output
Note
Bit 3 is fixed as a normal output.
(3) Block diagram (Port 1)
Figure 14-11. Block Diagram of P10 to P12, P14, and P15
P-ch
WR
PM
WR
PF
WR
PORT
RD
WR
PU
V
DD
V
DD
Selector
PF1n
PF1
PM1n
PM1
PU1n
PU1
P-ch
N-ch
Internal bus
Output latch
(P1n)
Alternate function
P10/SI0/SDA0
Note
P11/SO0
P12/SCK0/SCL0
Note
P14/SO1/TxD0
P15/SCK1/ASCK0
Note
The SDA0, SCL0 pins apply only to the
µ
PD70303xAY and 70F303wAY.
Remarks 1.
PU1: Pull-up resistor option register 1
PF1: Port 1 function register
PM1: Port 1 mode register
RD:
Port 1 read signal
WR:
Port 1 write signal
2.
n = 0 to 2, 4, 5
Содержание MPD703030A
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