Bit no.

7

6

5

4

3

2

1

0

Bit name

n/a

n/a

AMP_PHY_

IDLE_EN

n/a

AMP_OVR_

EN

AMP_OVR

VDD5V0_P

D

CP_PD

Operation

R/WP

R/WP

R/WP

R/WP

R/WP

R/WP

R/WP

R/WP

Default

Default from version 032

0

0

0

0

0

1

0

0

0

0

0

0

0

0

0

0

Table 23: Description of register FORCE_ANA_CTRL_SIGS

Register Name

Description

1

0

This bit has to be enabled in conjunction with enabling bit

SC_CMFB_EN in register MISC_CONF (see Table 8)

enabled

disabled

n/a

n/a, do not change

enabled

disabled

Control the override of the mode selection in the video amplifier by

the register bit AMP_OVR

enabled

disabled

Override of the mode selection in the video amplifier. Takes only ef-

fect if register bit AMP_OVR_EN is is high.

Differential

mode

Single-ended

mode

Force powering down the 5V regulator

Power down

Regulator running

Force powering down the charge pump

Power down

Charge pump

running

Table 24: Description of register setting FORCE_ANA_CTRL_SIGS

Notes:

1

In order to gain write access to the register FORCE_ANA_CTRL_SIGS, write the following sequence into the chip first:

•

Address 0xD0:ANA_TEST_MODE_EN_0 = 0x4a

•

Address 0xD1:ANA_TEST_MODE_EN_1 = 0x66

2

By default, FORCE_ANA_CTRL_SIGS is write-protected.

CHIP_REV_NO_REG

Bit no.

7

6

5

4

3

2

1

0

Bit name

CHIP_REV_NO

Operation

R

Default

see Table 26

Table 25: Description of register CHIP_REV_NO_REG

Reading this address returns a hard-coded value which is individual for each variant starting from X1023. For X1021, the value is hard-

coded to 0x1 for all variants. The value in the config block is automatically read after the reset is released. The read can be forced by

writing any data to the register CHIP_REV_NO_REG.

The values assigned are listed in Table 26.

Reticle identifier

Tape-out date

CHIP_REV_NO

X1021

04.12.12

0x1

X1023

15.02.2013

0x07, 0x0E, 0x0F, 0x12

X1024_000

23.12.2013

0x12, 0x13

X1024_001

06.06.2014

0x14, 0x15

X1024_002

24.09.2014

0x16, 0x17

epc901_000

20.03.2015

0x15, 0x1F

epc901_002

12.08.2015/09.10.2015

0x20

Table 26: List of chip identifiers for major revisions of IC

© 2016 ESPROS Photonics Corporation

Characteristics subject to change without notice

25 / 37

Datasheet_epc901-V5.6

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