HANBit
HMF8M8M4G
FLASH-ROM MODULE 8MByte (8M x 8-Bit)
Part No. HMF8M8M4G
GENERAL DESCRIPTION
The HMF8M8M4G is a high-speed flash read only memory (FROM) module containing 8,388,608 words organized in a x8bit
configuration. The module consists of four 2M x 8 FROM mounted on a 72-pin, single-sided, FR4-printed circuit board.
Commands are written to the command register using standard microprocessor write timings.
Register contents serve as input to an internal state-machine, which controls the erase and programming circuitry. Write cycles
also internally latch addresses and data needed for the programming and erase operations. Reading data out of the device is
similar to reading from 12.0V flash or EPROM devices.
Four chip enable inputs, (/CE1, /CE2, /CE3, /CE4) are used to enable the module’s 4 bytes independently. Output enable (/OE)
and write enable (/WE) can set the memory input and output.
When FROM module is disable condition the module is becoming power standby mode, system designer can get low-power
design. All module components may be powered from a single +5V DC power supply and all inputs and outputs are TTL-
compatible.
PIN ASSIGNMENT
FEATURES
PIN SYMBOL PIN
SYMBOL
PIN SYMBOL
w Part identification
1
2
Vss
/CE0
/CE1
/CE2
/CE3
Vcc
/WE
/OE
/RESET
A0
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
A15
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Vcc
NC
NC
NC
Vss
NC
NC
NC
NC
NC
- HMF8M8M4 (Solder Plating Lead)
- HMF8M8M4G (Gold Plating Lead)
A16
3
A17
w Access time : 70, 90, 120ns
w High-density 8MByte design
w High-reliability, low-power design
4
A18
5
A19
6
Vcc
w Single + 5V 0.5V power supply
±
7
A20
w Easy memory expansion
8
DQ0
w All inputs and outputs are TTL-compatible
w FR4-PCB design
9
DQ1
10
11
12
13
14
15
16
17
18
19
20
DQ2
w Low profile 72-pin SIMM
A1
DQ3
w Minimum 1,000,000 write/erase cycle
w Flexible sector architecture
w Embedded algorithms
A2
DQ4
A3
DQ5
A4
DQ6
w Erase suspend / Erase resume
A5
Vss
A6
DQ7
OPTIONS
w Timing
MARKING
A7
/RY_BY0
/RY_BY1
/RY_BY2
Vcc
A8
A9
70ns access
90ns access
120ns access
w Packages
72-pin SIMM
- 70
- 90
-120
A10
21
A11
45
/RY_BY3
69
NC
22
23
24
A12
A13
A14
46
47
48
NC
NC
NC
70
71
72
NC
NC
Vss
M
72-PIN SIMM
TOP VIEW
1
URL: www.hbe.co.kr
REV.02(August,2002)
HANBit Electronics Co., Ltd.
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