参数资料
型号: S29CL032J0RQAI033
厂商: SPANSION LLC
元件分类: PROM
英文描述: 1M X 32 FLASH 3.3V PROM, 48 ns, PQFP80
封装: PLASTIC, MO-108CB-1, QFP-80
文件页数: 15/79页
文件大小: 2994K
代理商: S29CL032J0RQAI033
22
S29CD-J & S29CL-J Flash Family
S29CD-J_CL-J_00_B3 March 30, 2009
Da ta
Sh e e t
8.
Device Operations
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 Table 8.1). The command register itself does not occupy any addressable
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.
8.1
Device Operation Table
The device must be set up appropriately for each operation. Table 8.1 describes the required state of each
control pin for any particular operation.
Legend
L = Logic Low = VIL, H = Logic High = VIH, X = Don’t care.
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.
Table 8.1 Device Bus Operation
Operation
CE#
OE#
WE#
RESET#
CLK
ADV#
Addresses
Data
(DQ0–DQ31)
Read
L
H
X
AIN
DOUT
Asynchronous Write
L
H
L
H
X
AIN
DIN
Synchronous Write
L
H
L
H
AIN
DIN
Standby (CE#)
H
X
H
X
HIGH Z
Output Disable
L
H
X
HIGH Z
Reset
X
L
X
HIGH Z
PPB Protection Status (Note 2)
L
H
X
Sector Address,
A9 = VID,
A7 – A0 = 02h
00000001h, (protected)
A6 = H
00000000h (unprotect)
A6 = L
Burst Read Operations
Load Starting Burst Address
L
X
H
AIN
X
Advance Burst to next address
with appropriate Data presented
on the Data bus
L
H
X
Burst Data Out
Terminate Current Burst Read Cycle
H
X
H
X
HIGH Z
Terminate Current Burst
Read Cycle with RESET#
XX
H
L
X
HIGH Z
Terminate Current Burst Read Cycle;
Start New Burst Read Cycle
LH
H
AIN
X
相关PDF资料
PDF描述
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