HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 322

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 I/O Ports
Port G Register (PORTG)
PORTG is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port G pins (PG
Bits 7 to 5 are reserved; they return an undetermined value if read, and cannot be modified.
If a port G read is performed while PGDDR bits are set to 1, the PGDR values are read. If a port G
read is performed while PGDDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORTG contents are determined by the pin
states, as PGDDR and PGDR are initialized. PORTG retains its prior state after a manual reset,
and in software standby mode.
Rev.3.00 Mar. 26, 2007 Page 280 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Note: * Determined by state of pins PG
:
:
:
Undefined
—
—
7
Undefined
—
—
6
4
to PG
Undefined
—
—
5
0
4
) must always be performed on PGDR.
to PG
0
PG4
—*
.
R
4
PG3
—*
R
3
PG2
—*
R
2
PG1
—*
R
1
PG0
—*
R
0