EZ80F91MCU Datasheet, PDF (286/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
267
EMAC PHY Configuration Data Register—High Byte
The High Byte of the EMAC PHY Configuration Data Register represents the con-
figuration data written to the external PHY. See Table 156.
Table 156. EMAC PHY Configuration Data Register—High Byte
(EMAC_CTLD_H = 003Dh)
Bit
Reset
CPU Access
Note: R/W = Read/Write.
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
0
R/W
1
0
R/W
0
0
R/W
Bit
Position
Value
[7:0]
00h–
EMAC_CTLD_H FFh
Description
These bits represent the High byte of the 2-byte PHY
configuration data value, {EMAC_CTLD_H,
EMAC_CTLD_L}. Bit 7 is bit 15 (msb) of the 16-bit value.
Bit 0 is bit 8 of the 16-bit value.
EMAC PHY Address Register
The EMAC PHY Address Register allows access to the external PHY registers.
See Table 157.
Table 157. EMAC PHY Address Register
(EMAC_RGAD = 003Eh)
Bit
7
6
Reset
0
0
CPU Access
R
R
Note: R = Read Only; R/W = Read/Write.
5
4
3
2
1
0
0
0
0
0
0
0
R R/W R/W R/W R/W R/W
Bit
Position
[7:5]
[4:0]
RGAD
Value
000
00h–
1Fh
Description
Reserved.
Programmable 5-bit value which selects address within the
selected external PHY.
PS019209-0504
PRELIMINARY
Ethernet Media Access Controller