RC28F128P33BF60A Micron Technology Inc, RC28F128P33BF60A Datasheet - Page 40

• Manufacturer Part Number: RC28F128P33BF60A
• Manufacturer: Micron Technology Inc

Specifications of RC28F128P33BF60A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

11.1.9
11.1.10
11.1.11
11.2
Datasheet
40
Clock Edge (RCR.6)
The Clock Edge (CE) bit selects either a rising (default) or falling clock edge for CLK.
This clock edge is used at the start of a burst cycle, to output synchronous data, and to
assert/deassert WAIT.
Burst Wrap (RCR.3)
The Burst Wrap (BW) bit determines whether 4, 8, or 16-word burst length accesses
wrap within the selected word-length boundaries or cross word-length boundaries.
When BW is set, burst wrapping does not occur (default). When BW is cleared, burst
wrapping occurs.
Burst Length (RCR[2:0])
The Burst Length bits (BL[2:0]) selects the linear burst length for all synchronous burst
reads of the flash memory array. The burst lengths are 4-word, 8-word, 16-word, and
continuous word.
Continuous burst accesses are linear only, and do not wrap within any word length
boundaries (see
cycle begins, the device outputs synchronous burst data until it reaches the end of the
“burstable” address space.
One-Time Programmable (OTP) Registers
The device contains 17 OTP Registers that can be used to implement system security
measures and/or device identification. Each OTP Register can be individually locked.
The first 128-bit OTP Register is comprised of two 64-bit (8-word) segments. The lower
64-bit segment is pre-programmed at the Numonyx factory with a unique 64-bit
number. The other 64-bit segment, as well as the other sixteen 128-bit OTP Registers,
are blank. Users can program these registers as needed. Once programmed, users can
then lock the OTP Register(s) to prevent additional bit programming (see
“OTP Register Map” on page
The OTP Registers contain OTP bits; when programmed, PR bits cannot be erased. Each
OTP Register can be accessed multiple times to program individual bits, as long as the
register remains unlocked.
Each OTP Register has an associated Lock Register bit. When a Lock Register bit is
programmed, the associated OTP Register can only be read; it can no longer be
programmed. Additionally, because the Lock Register bits themselves are OTP, when
programmed, Lock Register bits cannot be erased. Therefore, when a OTP Register is
locked, it cannot be unlocked.
Table 16, “Burst Sequence Word Ordering” on page
41).
Order Number: 208034-04
39). When a burst
Figure 12,
P33-65nm
Jul 2011