Instructions
N25Q128 - 1.8 V
Table 24. Instruction set: QIO-SPI protocol (page 2 of 2)
One-byte
One-byte
Instruction Address
Dummy
clock
cycle
Data
bytes
Instruction
Description
Instruction
Code (BIN)
Code
(HEX)
bytes
WRNVCR
RDVCR
Write NV Configuration Register
1011 0001
B1h
0
0
0
0
0
0
2
Read Volatile Configuration Register 1000 0101
Write Volatile Configuration Register 1000 0001
85h
81h
1 to ∞
WRVCR
1
Read Volatile Enhanced
0110 0101
RDVECR
65h
61h
0
0
0
0
1 to ∞
Configuration Register
Write Volatile Enhanced
0110 0001
WRVECR
1
Configuration Register
DP
Deep Power-down
1011 1001
1010 1011
B9h
ABh
0
0
0
0
0
0
RDP
Release from Deep Power-down
1) The number of Dummy Clock cycles is configurable by the user.
2) SSE is only available in devices with Bottom or Top architecture
9.3.1
Multiple I/O Read Identification (MIORDID)
The Multiple Input/Output Read Identification (MIORDID) instruction allows to read the
device identification data in the QIO-SPI protocol:
Manufacturer identification (1 byte)
Device identification (2 bytes)
Unlike the RDID instruction of the Extended SPI protocol, the Multiple Input/Output
instruction can not read the Unique ID code (UID) (17 bytes).
For further details on the manufacturer and device identification codes, see 9.1.1: Read
Identification (RDID).
Any Multiple Input/Output Read Identification (MIORDID) instruction while an Erase or
Program cycle is in progress, is not decoded, and has no effect on the cycle that is in
progress.
The device is first selected by driving Chip Select (S) Low. Then, the 8-bit instruction code
for the instruction is shifted in parallel on the 4 pins DQ0, DQ1, DQ2 and DQ3. After this, the
24-bit device identification, stored in the memory, will be shifted out on again in parallel on
DQ0, DQ1, DQ2 and DQ3. The identification bits are shifted out 4 at a time during the falling
edge of Serial Clock (C).
The Read Identification (RDID) instruction is terminated by driving Chip Select (S) High at
any time during data output.
When Chip Select (S) is driven High, the device is put in the Standby Power mode. Once in
the Standby Power mode, the device waits to be selected, so that it can receive, decode and
execute instructions.
Multiple I/O Read Identification (MIORDID) instruction sequence and data-out sequence
QIO-SPI.
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