m28f410 STMicroelectronics, m28f410 Datasheet - Page 6

• Manufacturer Part Number: m28f410
• Description: 4 Megabit X8 Or X16, Block Erase Flash Memory
• Manufacturer: STMicroelectronics

Table 8. AC Measurement Conditions
Figure 3. AC Testing Input Output Waveform
Table 9. Capacitance
Note: 1. Sampled only, not 100% tested.
DEVICE OPERATION
Signal Descriptions
A0-A17 Address Inputs. The address signals,
inputs for the memory array, are latched during a
write operation.
A9 Address Input is also used for the Electronic
Signature Operation. When A9 is raised to 12V the
Electronic Signature may be read. The A0 signal is
used to read two words or bytes, when A0 is Low
the Manufacturercode is read and when A0 is High
the Device code. When BYTE is Low DQ0-DQ7
output the codes and DQ8-DQ15 are don’t care,
when BYTE is High DQ0-DQ7 output the codes
and DQ8-DQ15 output 00h.
6/38
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
SRAM Interface
EPROM Interface
Symbol
0.45V
2.4V
C
C
3V
0V
OUT
IN
Input Capacitance
Output Capacitance
Parameter
(1)
(T
A
= 25 °C, f = 1 MHz )
AI01275
1.5V
2.0V
0.8V
SRAM Interface Levels
Test Condition
V
V
OUT
0 to 3V
IN
≤ 10ns
1.5V
= 0V
Figure 4. AC Testing Load Circuit
= 0V
DQ0-DQ7 Data Input/Outputs. The data inputs, a
byte or the lower byte of a word to be programmed
or a command to the C.I., are latched when both
Chip Enable E and Write Enable W are active. The
data output from the memory Array, the Electronic
Signature or Status Register is valid when Chip
Enable E and Output Enable G are active. The
output is high impedance when the chip is dese-
lected or the outputs are disabled.
DQ8-DQ14 and DQ15A-1 Data Input/Outputs.
These input/outputs are used in the word-wide
organization. When BYTE is High for the most
significant byte of the input or output, functioning
as described for DQ0-DQ7 above. When BYTE is
Low, DQ8-DQ14 are high impedance, DQ15A-1 is
the Address A-1 input.
C L = 30pF for SRAM Interface
C L = 100pF for EPROM Interface
C L includes JIG capacitance
DEVICE
UNDER
TEST
Min
1.3V
EPROM Interface Levels
1N914
3.3kΩ
0.45V to 2.4V
0.8V and 2V
C L = 30pF or 100pF
Max
12
≤ 10ns
6
OUT
AI01276
Unit
pF
pF