Other Parts Discussed in Thread: DP83869
Tool/software:
Hello,
I'm evaluating picking the DP83869HM to be used on an SFP module/transceiver.
The transceiver has to be compatible with SERDES (SGMII fixed at 1000M) MACs and due to the lack of real estate on the board the goal is to configure the device with straps only, ie no configuration via registers.
I was going through the data sheet and additional documents believing it will work until I read SNLA318 where it's stated without any other related reference in any other documents that there is a
"Required register configuration for 1000 Mbps Media Converter mode: - Write 0x1FFC to register 0x01EC (set bit [0] to 0"
which would render a straps-only implementation unsuccessful. So my question is very simple, is a straps-only configuration in 1000 Mbps Media Converter mode with the DP83869 possible or not?
The data sheet seems to imply that it is...
PHY Strap Table Configuration
RX_D0 = PHY_ADD[1:0] = 0 (def)
RX_D1 = PHY_ADD[3:2] = 0 (def)
OPMODE[2:0] = 4 (1000Base-T to 1000Base-X) »
JTAG_TDO/GPIO_1 = OPMODE[0] = 0 (def)
RX_D3 = OPMODE[1] = 0 (def)
RX_D2 = OPMODE[2] = 1
LED_0 = ANEG_DIS = 1 (Fiber Force Mode)
ANEGSEL_[1:0] = 3 (Copper : Auto Negotiation (1000 Advertised, Auto MDIX)
LED_2 = ANEGSEL_1 = 1
LED_1 = ANEGSEL_0 = 1
Thank you.
