S29CD-J_12 SPANSION [SPANSION], S29CD-J_12 Datasheet - Page 24
S29CD-J_12
Manufacturer Part Number
S29CD-J_12
Description
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S29CD-J_12.pdf
(81 pages)
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8. Device Operations
8.1
Legend
L = Logic Low = V
Notes
1. WP# controls the two outermost sectors of the top boot block or the two outermost sectors of the bottom boot block.
2. DQ0 reflects the sector PPB (or sector group PPB) and DQ1 reflects the DYB.
24
Read
Asynchronous Write
Synchronous Write
Standby (CE#)
Output Disable
Reset
PPB Protection Status (Note 2)
Burst Read Operations
Load Starting Burst Address
Advance Burst to next address
with appropriate Data presented
on the Data bus
Terminate Current Burst Read Cycle
Terminate Current Burst
Read Cycle with RESET#
Terminate Current Burst Read Cycle;
Start New Burst Read Cycle
Device Operation Table
Operation
IL
, H = Logic High = V
This section describes the read, program, erase, simultaneous read/write operations, and reset features of
the Flash devices.
Operations are initiated by writing specific commands or a sequence with specific address and data patterns
into the command register (see
memory location; rather, it is composed of latches that store the commands, along with the address and data
information needed to execute the command. The contents of the register serve as input to the internal state
machine; the state machine outputs dictate the function of the device. Writing incorrect address and data
values or writing them in an improper sequence may place the device in an unknown state, in which case the
system must write the reset command in order to return the device to the reading array data mode.
The device must be set up appropriately for each operation.
control pin for any particular operation.
IH
, X = Don’t care.
CE# OE#
H
X
H
X
L
L
L
L
L
L
L
L
H
H
X
H
X
X
X
X
H
L
L
L
S29CD-J and S29CL-J Flash Family
Table 8.1 Device Bus Operation
WE#
H
X
H
X
H
H
H
H
H
H
Table
L
L
RESET#
8.1). The command register itself does not occupy any addressable
H
H
H
H
H
H
H
H
H
H
L
L
D a t a
CLK
X
X
H
X
X
X
X
S h e e t
ADV#
X
X
X
X
X
X
H
X
X
Table 8.1
Sector Address,
A7 – A0 = 02h
Addresses
A9 = V
S29CD-J_CL-J_00_B7 October 11, 2012
High-Z
describes the required state of each
A
A
A
A
A
X
X
X
X
X
IN
IN
IN
IN
IN
ID
,
00000001h, (protected)
00000000h (unprotect)
Burst Data Out
(DQ0–DQ31)
High-Z
High-Z
High-Z
A6 = H
High-Z
High-Z
A6 = L
D
Data
D
D
OUT
X
X
IN
IN
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