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Valid mode bit pattern for continuous read mode in SEMPER(TM) Quad SPI - KBA233256

ArunKumarChoul
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Valid mode bit pattern for continuous read mode in SEMPER(TM) Quad SPI - KBA233256

Version: **

For continuous SDR Read operations in S25HL/HS-T family, the upper nibble of mode bits  is “A” and the lower nibble of mode bits is “x” (“don’t care”). The S25FL/FS-S family does not support continuous read mode for SDR Fast Read (0Ch). For continuous DDR Quad I/O Read operation, the mode bits must be “A5h” in the S25HL/HS-T, while the S25FL/FS-S family accepts other mode bit patterns where upper and lower nibbles are complementary; for example: 5Ah, F0h.

Following table shows the supported continuous read operations with the valid mode bit patterns:

Operation name

Instruction code

(HEX)

Valid mode bit pattern (HEX) for continuous read operations

S25HL/HS-T

S25FL/FS-S

SDR Fast Read

0C

Ax

Not supported

SDR Dual I/O Read

BB / BC

Ax

Ax

SDR Quad I/O Read

EB / EC

Ax

Ax

DDR Quad I/O Read

ED / EE

A5

Upper and lower nibbles are complementary

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Last update:
‎Sep 16, 2021 02:15 AM
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