AM79C978VCSLASHW datasheet(187/261 Pages) AMD

187 / 261 page

Am79C978

187

HPR29: HomePNA PHY TX Control (Register 29)

Table 61.

HPR29: HomePNA PHY TX Control (Register 29)

HPR30: 1 Mbps HomePNA PHY Drive Level Control

Test Register (Register 30)

Table 62.

HPR30: HomePNA PHY Drive Level Control Test Register (Register 30)

HPR31: 1 Mbps HomePNA PHY Analog Control

Table 63.

HPR31: HomePNA PHY Analog Control Register (Register 31)

Note: 1. Writes to these bits will cause undefined functionality.

Bits

Mnemonic

Description

Read/

Write

Default

Hex

Soft

Reset

TX_CTRL

15:8

TX_PULSE_WIDTH

This value defines the duration of a transmit

pulse in OSC cycles (16.7 ns). This will

effectively determine the transmit spectrum of

the PHY.

R/W

7:4

TX_PULSE_CYCLES_N

This value defines the number of pulses that

will be driven onto the HRTXRX_N pin.

R/W

3:0

TX_PULSE_CYCLES_P

This value defines the number of pulses that

will be driven onto the HRTXRX_P pin.

R/W

Bits

Mnemonic

Description

Read/

Write

Default

Hex

Soft

Reset

15:12

RES

Reserved; Write = 0; Read = X

11:6

High Level Control

Defines the drive level that will be utilized in the

High Power mode.

R/W

5:0

Low Level Control

Defines the drive level that will be utilized in the

Low Power mode.

R/W

Bits

Mnemonic

Description

Read/

Write

Default

Hex

Soft

Reset

15:11

Level_Adjust

Global output slope adjustment. These bits

control the number of current sources enable

for transmit. Each bit represents a single

current source. Thus 10101 enables three

current sources as does 11100.

R/W

10:8

Reserved

Reserved; Write = 0

R/W

Force_Link_Valid

1 = Link Status bit will be held valid

0 = Normal operation

R/W

6:0

Reserved

Reserved; Write = 0

R/W

AM79C978VC/W 数据表(PDF) 187 Page - Advanced Micro Devices

AM79C978VC/W 数据表(HTML) 187 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载

链接网址

AM79C978VC/W 数据表(PDF) 187 Page - Advanced Micro Devices

AM79C978VC/W 数据表(HTML) 187 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表 下载

链接网址

数据表下载