Renesas SH7709S Manual De Usuario
Rev. 5.00, 09/03, page 602 of 760
19.9.2
Port H Data Register (PHDR)
Bit:
7
6
5
4
3
2
1
0
PH7DT
PH6DT
PH5DT
PH4DT
PH3DT
PH2DT
PH1DT
PH0DT
Initial value:
0
*
*
*
*
*
*
*
R/W:
R/W
R
R
R
R
R
R
R
Note:
*
Undefined
The port H data register (PHDR) is a 1-bit readable/writable and 7-bit read-only register that stores
data for pins PTH7 to PTH0. Bits PH7DT to PH0DT correspond to pins PTH7 to PTH0. When the
pin function is general output port, if the port is read, the value of the corresponding PHDR bit is
returned directly. When the function is general input port, if the port is read, the corresponding pin
level is read. Table 19.16 shows the function of PHDR.
data for pins PTH7 to PTH0. Bits PH7DT to PH0DT correspond to pins PTH7 to PTH0. When the
pin function is general output port, if the port is read, the value of the corresponding PHDR bit is
returned directly. When the function is general input port, if the port is read, the corresponding pin
level is read. Table 19.16 shows the function of PHDR.
PHDR is initialized to B'0******* by a power-on reset, after which the general input port function
(pull-up MOS on) is set as the initial pin function, and the corresponding pin levels are read. It
retains its previous value in standby mode and sleep mode, and in a manual reset.
(pull-up MOS on) is set as the initial pin function, and the corresponding pin levels are read. It
retains its previous value in standby mode and sleep mode, and in a manual reset.
Note that the low level is read if bits 6 to 0 are read except in general-purpose input.
Table 19.16 Port H Data Register (PHDR) Read/Write Operations
PHnMD1
PHnMD0
Pin State
Read
Write
0
0
Other function
(see table 18.1)
(see table 18.1)
PHDR value
Value is written to PHDR, but does not
affect pin state
affect pin state
1
Output
PHDR value
Write value is output from pin
1
0
Input (Pull-up
MOS on)
MOS on)
Pin state
Value is written to PHDR, but does not
affect pin state
affect pin state
1
Input (Pull-up
MOS off)
MOS off)
Pin state
Value is written to PHDR, but does not
affect pin state
affect pin state
(n = 7)
PHnMD1
PHnMD0
Pin State
Read
Write
0
0
Other function
(see table 18.1)
(see table 18.1)
Low level
Ignored (no effect on pin state)
1
Reserved
Low level
Ignored (no effect on pin state)
1
0
Input (Pull-up
MOS on)
MOS on)
Pin state
Ignored (no effect on pin state)
1
Input (Pull-up
MOS off)
MOS off)
Pin state
Ignored (no effect on pin state)
(n = 0 to 6)