MMC2107 - Freescale Semiconductor

Freescale Semiconductor, Inc.
Non-Volatile Memory FLASH (CMFR)
Functional Description
Table 9-7. Program Interlock State Descriptions (Continued)
State
Mode
Next
State
Transition Requirement
nc...
Freescale Semiconductor, I
S3
S4
S5
Expanded program hardware interlock
operation: Program margin reads.
Programming writes accepted; all eight
program pages can be programmed. Writes
can be to any array location. Program page
buffers updated using only data, lower
address, and block address. Normal register
accesses. CMFRCTL write can change
EHV. If write is to a register, no data is
stored in program page buffer.
Program operation: High voltage applied to
array or shadow information to program
CMFR bitcells. Pulse width timer active if
SCLKR[2:0] ≠ 0; HVS can be polled to time
program pulse. Programming writes not
accepted. During programming, array
cannot be accessed (bus error). Normal
register accesses. CMFRCTL write can
change only EHV.
Program margin read operation: Reads
determine if bits on selected page need
modification by program operation. Once bit
is fully programmed, data stored in program
page is updated; no further programming
occurs for that bit and value read is 0.
While it is not necessary to read all words on a
page to determine if another program pulse
is needed, all pages being programmed
must be read once after each program
pulse.
S1 T6 Write SES = 0 or master reset
S4 T4 Write EHV = 1
S1 T7 Master reset
S5 T5 EHV = 0 and HVS = 0
S4 T8 Write EHV = 1
S1 T9 Write SES = 0 or a master reset
9.8.4.2 Program Margin Reads
The CMFR provides a program margin read with electrical margin for the
program state. Program margin reads provide sufficient margin to
assure specified data retention. The program margin read is enabled
when SE = 1 and a programming write has occurred. To increase the
access time of the program margin read the off-page access time is 17
clocks instead of the usual 2-clock off-page read access time. The
program margin read and subsequent on-page program verify reads
MMC2107 – Rev. 2.0
Technical Data
MOTOROLA Non-Volatile Memory FLASH (CMFR) 211
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