參數(shù)資料
型號(hào)： NAND512R4A2CZD6E
廠商： NUMONYX
元件分類： PROM
英文描述： 32M X 16 FLASH 1.8V PROM, 15000 ns, PBGA55
封裝： 8 X 10 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFBGA-55
文件頁數(shù)： 15/55頁
文件大?。?/td> 1377K
代理商： NAND512R4A2CZD6E
Device operations
NAND512-A2C
Figure 8.
Pointer operations for programming
6.2
Read memory array
Each operation to read the memory area starts with a pointer operation as shown in the
Section 6.1: Pointer operations. Once the area (main or spare) has been selected using the
Read A, Read B or Read C commands four bus cycles (for 512-Mbit and 1-Gbit devices) or
three bus cycles (for 128-Mbit and 256-Mbit devices) are required to input the address (refer
to Table 6 and Table 7) of the data to be read.
The device defaults to read A mode after power-up or a reset operation.
When reading the spare area addresses:
●
A0 to A3 (x8 devices)
●
A0 to A2 (x16 devices)
are used to set the start address of the spare area while addresses:
●
A4 to A7 (x8 devices)
●
A3 to A7 (x16 devices)
are ignored.
Once the Read A or Read C commands have been issued they do not need to be reissued
for subsequent read operations as the pointer remains in the respective area. However, the
Read B command is effective for only one operation, once an operation has been executed
in area B the pointer returns automatically to area A and so another Read B command is
required to start another read operation in area B.
Once a Read command is issued two types of operations are available: random read and
page read.
6.2.1
Random read
Each time the command is issued the first read is random read.
ai07591
I/O
Address
Inputs
Data Input
10h
80h
Areas A, B, C can be programmed depending on how much data is input. Subsequent 00h commands can be omitted.
AREA A
00h
Address
Inputs
Data Input
10h
80h
00h
I/O
Address
Inputs
Data Input
10h
80h
Areas B, C can be programmed depending on how much data is input. The 01h command must be re-issued before each program.
AREA B
01h
Address
Inputs
Data Input
10h
80h
01h
I/O
Address
Inputs
Data Input
10h
80h
Only Areas C can be programmed. Subsequent 50h commands can be omitted.
AREA C
50h
Address
Inputs
Data Input
10h
80h
50h
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