N25Q256A11ESF40F Datasheet, PDF (25/87 Pages) Micron Technology – Micron Serial NOR Flash Memory

1.8V, 256Mb: Multiple I/O Serial Flash Memory
Nonvolatile and Volatile Registers
Table 14: Enhanced Volatile Configuration Register Bit Definitions (Continued)
Note 1 applies to entire table
Bit Name
3
V_PP accelerator
Settings
0 = Enabled
1 = Disabled (Default)
2:0 Output driver strength 000 = Reserved
001 = 90 Ohms
010 = 60 Ohms
011 = 45 Ohms
100 = Reserved
101 = 20 Ohms
110 = 15 Ohms
111 = 30 (Default)
Description
Enables or disables V_PP acceleration for QUAD
INPUT FAST PROGRAM and QUAD INPUT EX-
TENDED FAST PROGRAM OPERATIONS.
Optimizes impedance at V_CC/2 output voltage.
Notes
Notes:
1. Settings determine the device memory configuration upon a change of those settings by
the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The register is
read from or written to in all protocols by READ ENHANCED VOLATILE CONFIGURATION
REGISTER or WRITE ENHANCED VOLATILE CONFIGURATION REGISTER commands, respec-
tively.
2. If bits 6 and 7 are both set to 0, the device operates in quad I/O. When either bit 6 or 7 is
reset to 0, the device operates in dual I/O or quad I/O, respectively, following the next
WRITE ENHANCED VOLATILE CONFIGURATION command.
Flag Status Register
Table 15: Flag Status Register Bit Definitions
Note 1 applies to entire table
Bit Name
Settings
7 Program or
erase
controller
0 = Busy
1 = Ready
6 Erase suspend 0 = Not in effect
1 = In effect
5 Erase
0 = Clear
1 = Failure or protection error
4 Program
0 = Clear
1 = Failure or protection error
3 V_PP
2 Program
suspend
0 = Enabled
1 = Disabled (Default)
0 = Not in effect
1 = In effect
Description
Notes
Status bit: Indicates whether a PROGRAM, ERASE,
2, 3
WRITE STATUS REGISTER, or WRITE NONVOLATILE CON-
FIGURATION command cycle is in progress.
Status bit: Indicates whether an ERASE operation has
3
been or is going to be suspended.
Error bit: Indicates whether an ERASE operation has
4, 5
succeeded or failed.
Error bit: Indicates whether a PROGRAM operation has 4, 5
succeeded or failed. Also indicates an attempt to pro-
gram a 0 to a 1 when V_PP = V_PPH and the data pattern is
a multiple of 64 bits.
Error bit: Indicates an invalid voltage on V_PP during a
4, 5
PROGRAM or ERASE operation.
Status bit: Indicates whether a PROGRAM operation
3
has been or is going to be suspended.
PDF: 09005aef846a804a
n25q_256mb_1_8V_65nm.pdf - Rev. G 2/2012 EN
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