Texas Instruments PCI7621, PCI7411, PCI7611, PCI7421 PHY Layer Control Register, PHY layer control

8.33 PHY Layer Control Register

The PHY layer control register reads from or writes to a PHY register. See Table 8−25 for a complete description of the register contents.

Bit	31	30	29	28	27	26	25		24	23	22	21	20	19	18	17	16
Name								PHY layer control
Type	RU	R	R	R	RU	RU	RU		RU	RU	RU	RU	RU	RU	RU	RU	RU
Default	0	0	0	0	0	0	0		0	0	0	0	0	0	0	0	0

Bit	15	14	13	12	11	10	9		8	7	6	5	4	3	2	1	0
Name								PHY layer control
Type	RWU	RWU	R	R	RW	RW	RW		RW	RW	RW	RW	RW	RW	RW	RW	RW
Default	0	0	0	0	0	0	0		0	0	0	0	0	0	0	0	0
	Register:		PHY layer control
	Offset:		ECh
	Type:		Read/Write/Update, Read/Write, Read/Update, Read-only
	Default:		0000 0000h

			Table 8−25. PHY Control Register Description
BIT	FIELD NAME	TYPE		DESCRIPTION
31	rdDone	RU		Bit 31 is cleared to 0 by the PCI7x21/PCI7x11 controller when either bit 15 (rdReg) or bit 14 (wrReg)
				is set to 1. This bit is set to 1 when a register transfer is received from the PHY layer.
30−28	RSVD	R		Reserved. Bits 30−28 return 0s when read.
27−24	rdAddr	RU		This field is the address of the register most recently received from the PHY layer.
23−16	rdData	RU		This field is the contents of a PHY register that has been read.
15	rdReg	RWU		Bit 15 is set to 1 by software to initiate a read request to a PHY register, and is cleared by hardware
				when the request has been sent. Bits 14 (wrReg) and 15 (rdReg) must not both be set to 1
				simultaneously.
14	wrReg	RWU		Bit 14 is set to 1 by software to initiate a write request to a PHY register, and is cleared by hardware
				when the request has been sent. Bits 14 (wrReg) and 15 (rdReg) must not both be set to 1
				simultaneously.
13−12	RSVD	R		Reserved. Bits 13 and 12 return 0s when read.
11−8	regAddr	RW		This field is the address of the PHY register to be written or read. The default value for this field is 0h.
7−0	wrData	RW		This field is the data to be written to a PHY register and is ignored for reads. The default value for this
				field is 00h.

8−30