N25Q128 Datasheet, PDF (52/185 Pages) Numonyx B.V – 128-Mbit, 1.8 V, multiple I/O, 4-Kbyte subsector erase on boot sectors, XiP enabled, serial flash memory with 108 MHz SPI bus interface

Memory organization
8
Memory organization
N25Q128 - 1.8 V
The memory is organized as:
„ 16,777,216 bytes (8 bits each)
„ 256 sectors (64 Kbytes each)
„ In Bottom and Top versions: 8 bottom (top) 64 Kbytes boot sectors with 16 subsectors
(4 Kbytes) and 248 standard 64 KB sectors
„ 65,536 pages (256 bytes each)
„ 64 OTP bytes located outside the main memory array
Each page can be individually programmed (bits are programmed from 1 to 0). The device is
Sector or Bulk Erasable (bits are erased from 0 to 1) but not Page Erasable, Subsector
Erase is allowed on the 8 boot sectors (for devices with bottom or top architecture).
Figure 9. Block diagram
HOLD
W/V_PP
S
Control Logic
High Voltage
Generator
64 OTP bytes
C
DQ0
DQ1
DQ2
I/O Shift Register
DQ3
Address Register
and Counter
256 Byte
Data Buffer
Status
Register
FFFFFFh
52/185
00000h
000FFh
256 bytes (page size)
X Decoder
AI13722a