HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 396

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

9.2.3
Note: * The flag is cleared by writing 1. Writing 0 does not affect the flag.
The EtherC status register shows the internal status of the EtherC. This status information can be
reported to the CPU by means of interrupts. Individual bits are cleared by writing 1 to them. For
bits that generate an interrupt, the interrupt can be enabled or disabled by means of the
corresponding bit in the EtherC status interrupt permission register (ECSIPR).
Bits 31 to 3—Reserved: These bits are always read as 0. The write value should always be 0.
Bit 2—LINK Signal Changed (LCHNG): Indicates that the LNKSTA signal input from the PHY-
LSI has changed from high to low, or from low to high. This bit is cleared by writing 1 to it.
Writing 0 to this bit has no effect.
Bit 2: LCHNG
0
1
Notes: 1. The current link status can be checked by referencing the LMON bit in the PHY
Bit 1—Magic Packet Detection (MPD): Indicates that a Magic Packet has been detected on the
line. This bit is cleared by writing 1 to it. Writing 0 to this bit has no effect.
Bit 1: MPD
0
1
Bit 0—Illegal Carrier Detection (ICD): Indicates that PHY-LSI has detected an illegal carrier on
the line. This bit is cleared by writing 1 to it. Writing 0 to this bit has no effect.
380
Initial value:
Initial value:
2. Signal variation may be detected when the LNKSTA function is selected by the port A
EtherC Status Register (ECSR)
interface status register (PSR).
control register (PACR) of the pin function controller (PFC).
R/W:
R/W:
Bit:
Bit:
Description
LNKSTA signal change has not been detected
LNKSTA signal change (high-to-low or low-to-high) has been detected
Description
Magic Packet has not been detected
Magic Packet has been detected
31
—
—
0
R
7
0
R
30
—
—
0
R
6
0
R
29
—
—
0
R
5
0
R
. . .
. . .
. . .
. . .
—
4
0
R
11
—
—
0
R
3
0
R
LCHNG
R/W*
10
—
0
R
2
0
R/W*
MPD
—
9
0
R
1
0
(Initial value)
(Initial value)
R/W*
ICD
—
8
0
R
0
0