AS3956 datasheet(57/107 Pages) AMSCO

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ams Datasheet

Page 57

[v1-11] 2018-Nov-14

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AS3956 − Detailed Description

Figure 53:

Error Handling in Extended Mode

Wired Interfaces

AS3956 host interface can be configured to be either SPI or I²C

at production (Fabrication Data FAB_CFG0). In both cases, the

/SS signal is also used to control the IC power state. By pulling

the /SS low, the chip interface or the chip itself is enabled /

powered (see Power Management). Note that interrupting SPI

/ I²C operations or issuing incomplete command sequence from

the MCU may result in corrupted data content. For more

information on EEPROM and buffer data reading and writing

see EEPROM Read and Write and Data Buffer sections.

Command

Condition

Error Type

Write buffer (T2T Write)

Start with FD, FE or FF

NAK0, SLEEP

Write buffer (T2T Write)

Write when io_data_rdy=1 or

rf_data_rdy=1

NAK0, SLEEP

Clear buffer (T2T Write on block FFh)

Write none zero data

NAK0, SLEEP

Read buffer (T2T read on block FCh)

Read on FD, FE, FF

NAK0, SLEEP

Read buffer (T2T read on block FCh)

Buffer access collision

NAK5, SLEEP

Write buffer (T2T Write)

Buffer access collision

NAK5, SLEEP

Clear buffer (T2T Write on block FFh)

Buffer access collision

NAK5, SLEEP

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