Section 23 Gigabit Ethernet Controller (GETHER)
Rev. 1.00 Oct. 01, 2007 Page 989 of 1956
REJ09B0256-0100
23.5.4 Accessing
MII
Registers
MII registers in the PHY-LSI are accessed via PIR in this LSI. PIR is used as a serial interface
conforming to the MII frame format specified in IEEE802.3u.
(1) MII Management Frame Format
Figure 23.32 shows the format of an MII management frame. To access an MII register, a
management frame is implemented by the program in accordance with the procedures shown in
MII Register Access Procedure.
Access Type
MII Management Frame
Item
Number of bits
Read
Write
PRE
32
1..1
1..1
ST
2
01
01
OP
2
10
01
PHYAD
5
00001
00001
REGAD
5
RRRRR
RRRRR
TA
2
Z0
10
DATA
16
D..D
D..D
IDLE
X
PRE:
ST:
OP:
PHYAD:
REGAD:
TA:
DATA:
IDLE:
32 consecutive 1s
Write of 01 indicating start of frame
Write of code indicating access type
Write of 0001 if the PHY-LSI address is 1 (sequential write starting with the MSB).
This bit changes depending on the PHY-LSI address.
Write of 000q if the register address is 1 (sequential write starting with the MSB).
This bit changes depending on the PHY-LSI register address.
Time for switching data transmission source on MII interface
(a) Write: 10 written
(b) Read: Bus release (notation: Z0) perdormed
16-bit data. Sequential write or read from MSB
(a) Write: 16-bit data write
(b) Read: 16-bit data read
Wait time until next MII management format input
(a) Write: Independent bus release (notation: X) performad
(d) Read: Bus already released in TA: control unnecessary
[Legend]
Figure 23.32 MII Management Frame Format
Summary of Contents for SH7763
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Page 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Page 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Page 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Page 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Page 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Page 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Page 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Page 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Page 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Page 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Page 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Page 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Page 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Page 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Page 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Page 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Page 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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