HANBit
HMNR328D(V)
READ Mode
The HMNR328D(V) is in the READ Mode whenever /WE (WRITE Enable) is high and /CE (Chip Enable) is low. The
unique address specified by the 15 Address Inputs defines which one of the 32,768 bytes of data is to be accessed. Valid
data will be available at the Data I/O pins within Address Access Time (tAVQV) after the last address input signal is stable,
providing the /CE and /OE access times are also satisfied. If the /CE and /OE access times are not met, valid data will be
available after the latter of the Chip Enable Access Times (tELQV) or Output Enable Access Time (tGLQV). The state of the
eight three-state Data I/O signals is controlled by /CE and /OE. If the outputs are activated before tAVQV, the data lines will
be driven to an indeterminate state until tAVQV. If the Address Inputs are changed while /CE and /OE remain active, output
data will remain valid for Output Data Hold Time (tAXQX) but will go indeterminate until the next Address Access.
READ Mode AC Waveforms
/CE
/OE
Note : /WE = High.
READ Mode AC Characteristics
HMNR328D
-70
HMNR328D
-100
HMNR328DV
-85
Unit
Symbol
Parameter
Min
70
Max
Min
100
Max
Min
85
Max
tAVAV
tAVQV
tELQV
tGLQV
READ Cycle Time
nS
nS
nS
nS
nS
nS
nS
nS
nS
Address Valid to Output Valid
70
70
35
100
100
50
85
85
35
Chip Enable Low to Output Valid
Output Enable Low to Output Valid
Chip Enable Low to Output Transition
Output Enable Low to Output Transition
Chip Enable High to Output Hi-Z
Output Enable High to Output Hi-Z
Address Transition to Output Transition
(2)
tELQX
5
5
10
5
5
0
(2)
tGLQX
(2)
tEHQZ
25
25
40
40
25
25
(2)
tGHQZ
tAXQX
10
10
10
Note: 1.Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
2. CL = 5pF.
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HANBit Electronics Co.,Ltd.
Rev. 0.0 (January, 2002)
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
