參數(shù)資料
型號(hào)： W28J320TT90L
廠商： WINBOND ELECTRONICS CORP
元件分類： PROM
英文描述： 2M X 16 FLASH 2.7V PROM, 90 ns, PDSO48
封裝： 12 X 20 MM, TSOP-48
文件頁(yè)數(shù)： 45/48頁(yè)
文件大小： 1513K
代理商： W28J320TT90L
W28J320B/T
- 6 -
Block Organization
This product features an asymmetrically-blocked architecture providing system memory integration.
Each erase block can be erased independently of the others up to 100,000 times. For the address
locations of the blocks, see the memory map in Figure 3.
Boot Blocks: The boot block is intended to replace a dedicated boot PROM in a microprocessor or
microcontroller-based system. This boot block 4k words (4,096 words) features hardware controllable
write protection to protect the crucial microprocessor boot code from accidental modification. The
protection of the boot block is controlled using a combination of the VPP, #RESET, #WP pins and block
lock-bit.
Parameter Blocks: The boot block architecture includes parameter blocks to facilitate storage of
frequently update small parameters that would normally require an EEPROM. By using software
techniques, the word-rewrite functionality of EEPROMs can be emulated. Each boot block component
contains six parameter blocks of 4k words (4,096 words) each. The protection of the parameter block
is controlled using a combination of the VPP, #RESET and block lock-bit.
Main Blocks: The reminder is divided into main blocks for data or code storage. Each 32M-bit device
contains sixty-three 32k words (32,768 words) blocks. The protection of the main block is controlled
using a combination of the VPP, #RESET and block lock-bit.
5. PIN CONFIGURATION
48-pin TSOP
Standard Pinout
12mm X 20mm
Top View
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
DQ15/A-1
#OE
A16
#CE
A0
48
47
746
45
44
43
42
41
DQ11
DQ3
DQ10
DQ2
DQ9
DQ1
DQ8
DQ0
VDD
DQ7
DQ14
DQ6
DQ13
DQ5
DQ12
DQ4
#BYTE
Vss
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
A9
A10
A11
A12
A13
A14
A15
24
23
A17
#WE
A7
A6
A5
A4
A3
A2
A1
21
22
#WP
A18
RY/#BY
#RESET
A20
A19
A8
VPP
Figure 2. TSOP 48-Lead Pinout
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