ADIN2111CCPZ-R7 datasheet(36/125 Pages) AD

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Data Sheet

ADIN2111

SWITCH SPI

analog.com

Rev. 0 | 36 of 125

Table 30. Control Write Transaction with CRC

MSB

LSB

D102

D101

D100 to D89

D88 to D80

D79 to D48

D47 to D40

D39 to D8

D7 to D0

SDI

R/W

ADDR[12:0]

CRC[7:0]

DATA0[31:0]

CRC[7:0]

DATA1[31:0]

CRC[7:0]

Table 31. Control Read Transaction with CRC

MSB

LSB

D110

D109

D108

D107 to D96

D95 to D88

D87 to D80

D79 to D48

D47 to D40

D39 to D8

D7 to D0

SDI

R/W

ADDR[12:0]

CRC[7:0]

TA[7:0]

SDO

DATA0[31:0]

CRC[7:0]

DATA1[31:0]

CRC[7:0]

Table 32. Data Write Transaction with CRC

MSB

LSB

D86

D85

D84

D83 to D71

D71 to D64

D63 to D32

D31 to D0

SDI

R/W

ADDR[12:0]

CRC[7:0]

DATA0[31:0]

DATA1[31:0]

Table 33. Data Read Transaction with CRC

MSB

LSB

D94

D93

D92

D91 to D80

D79 to D72

D71 to D64

D63 to D32

D31 to 0

SDI

R/W

ADDR[12:0]

CRC[7:0]

TA[7:0]

SDO

DATA0[31:0]

DATA1[31:0]

The generic SPI protocol is half duplex. Therefore, it is not possible

to write frame data into the MAC_TX register and read from the

MAC_RX register at the same time. Because of this, the SPI SCLK

frequency must be 25 MHz to achieve full duplex transmissions on

Ethernet at 10 Mbps.

MAC Frame: Transmit and Receive

The 2-byte frame header shown in Table 34 is appended to all

transmitted and received frames. This frame header always pre-

cedes the frame data (see Figure 21).

Time Stamp Capture

On receive, if TIME_STAMP_PRESET is asserted, an additional

4-byte or 8-byte time stamp is provided after the 2-byte header in

Table 34 and before the data frame. This time stamp can then be

stored or discarded by software when reading the receive FIFO.

On transmit, if EGRESS_CAPTURE is set other than 00, the

ADIN2111 captures the time stamp of the transmitted frame into

the respective TTSCxH and TTSCxL registers for Port 1, and

P2_TTSCxH and P2_TTSCxL for Port 2.

To enable the time stamp capture signal pin, enable the P1_LED_0

or TEST_1 pins to be muxed as the time stamp input pin using the

DIGIO_TSCAPT_PINMUX bits field in the Pin Mux Configuration 1

The time stamp counter can be enabled by setting TS_EN

(TS_CFG register) to 1 and setting FTSE (CONFIG0 register) to

Time Stamp Timer Output

The ADIN2111 supports a TS_TIMER output signal. TS_TIMER can

be started at a defined time relative to the nanoseconds counter.

The TS_TIMER counter start time register (TS_TIMER_START) is

used to set the start time. TS_TIMER then toggles based on the

high and low times configured in high period for the TS_TIMER

(TS_TIMER_LO).

Use the following sequence to enable the TS_TIMER output:

1. Configure the P1_LED_0 pin to the TS_TIMER function using

the LED control register (LED_CNTRL).

2. To change the default value of the TS_TIMER from 0 to 1,

write 1 to TS_TIMER_DEF in the timer configuration register

(TS_CFG). TS_TIMER immediately toggles from 0 to 1.

3. Write to the TS_TIMER_HI and TS_TIMER_LO bits to set the

required high time and low time for the TS_TIMER output.

4. Configure the quantization error correction register (TS_TIM-

ER_QE_CORR) to set the required quantization error correc-

tion.

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