Port Data Register (Pcipdtr) - Hitachi SH7751 Hardware Manual

22.2.40 Port Data Register (PCIPDTR)

Bit: 31
—
Initial value: 0
PCI-R/W: —
PP Bus-R/W: R
Bit: 7
—
Initial value: 0
PCI-R/W: —
PP Bus-R/W: R
The port data register (PCIPDTR) inputs and outputs the port data when allocation of the port
function to the unwanted PCI bus arbitration pins is enabled when the PCIC is operating in non-
host mode. This 32-bit read/write register can be accessed from the PP bus.
The PCIPDTR register is intialized to H'00000000 at a power-on reset. It is not initialized at a
software reset.
Data is output in sync with the local bus clock. Input data is fetched at the rising edge of the local
bus clock.
Bits 31 to 6—Reserved: These bits always return 0 when read. Always write 0 to these bits when
writing.
Bit 5—Port 2 Output Data (PB5DT): Output data when
  
( pin is output-only.)
Bit 4—Port 2 Input/Output Data (PB4DT): Receives input data and sets output data when the
 
pin is used as a port.
Bit 3—Port 1 Output Data (PB3DT): Output data when
  
( pin is output-only.)
Bit 2—Port 1 Input/Output Data (PB2DT): Receives input data and sets output data when the
 
pin is used as a port.
Bit 1—Port 0 Output Data (PB1DT): Output data when
  
( pin is output-only.)
30 29 . . .
— — . . .
0 0 . . .
— — . . .
R R . . .
6 5
— PB5DT PB4DT
0 0
— —
R R/W R/W
11 10
—
0
—
R
4 3
PB3DT PB2DT
0 0
— —
R/W R/W
  
pin is used as port.
  
pin is used as port.
  
pin is used as port.
Rev. 3.0, 04/02, page 877 of 1064
9
— — —
0 0
— — —
R R
2 1
PB1DT PB0DT
0 0
— — —
R/W R/W
8
0
R
0
0