will not produce standby currents until any nonvolatile cycle in progress has timed out. See MODE SELECTION table.
Note e: Parameter guaranteed but not tested.
Note f: For READ CYCLE #1 and #2, W is high for entire cycle.
Note g: Device is continuously selected with E low and G low.
Note h: Measured
±
200mV from steady state output voltage.
READ CYCLE #1
f,g
2
t
AVAV
ADDRESS
5
3
t
AVQV
DATA VALID
t
AXQX
DQ (Data Out)
READ CYCLE #2
f
2
t
AVAV
ADDRESS
1
t
ELQV
11
t
EHICCL
7
t
EHQZ
9
t
GHQZ
DATA VALID
E
6
t
ELQX
G
t
GLQV
8
t
GLQX
4
DQ (Data Out)
10
t
ELICCH
I
CC
ACTIVE
STANDBY
4-55
STK12C68-M
WRITE CYCLES #1 & #2
SYMBOLS
NO.
12
13
14
15
16
17
18
19
20
21
#1
t
AVAV
t
WLWH
t
ELWH
t
DVWH
t
WHDX
t
AVWH
t
AVWL
t
WHAX
t
WLQZ h,j
t
WHQX
#2
t
AVAV
t
WLEH
t
ELEH
t
DVEH
t
EHDX
t
AVEH
t
AVEL
t
EHAX
Alt.
t
WC
t
WP
t
CW
t
DW
t
DH
t
AW
t
AS
t
WR
t
WZ
t
OW
PARAMETER
Write Cycle Time
Write Pulse Width
Chip Enable to End of Write
Data Set-up to End of Write
Data Hold After End of Write
Address Set-up to End of Write
Address Set-up to Start of Write
Address Hold After End of Write
Write Enable to Output Disable
Output Active After End of Write
5
STK12C68-40M
MIN
35
30
30
18
0
30
0
0
17
5
MAX
STK12C68-45M
MIN
45
35
35
20
0
35
0
0
20
5
MAX
(V
CC
= 5.0V
±
10%)
d
STK12C68-55M
MIN
55
45
45
25
0
45
0
0
25
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note h: Measured
±200mV
from steady state output voltage.
Note i:
Note j:
E or W must be
≥
V
IH
during address transitions.
If W is low when E goes low, the outputs remain in the high impedance state.
WRITE CYCLE #1:
W CONTROLLED
i
12
t
AVAV
ADDRESS
14
t
ELWH
E
18
17
t
AVWH
19
t
WHAX
t
AVWL
W
13
t
WLWH
15
t
DVWH
16
t
WHDX
DATA IN
20
t
WLQZ
DATA OUT
PREVIOUS DATA
DATA VALID
21
t
WHQX
HIGH IMPEDANCE
WRITE CYCLE #2:
E CONTROLLED
i
12
t
AVAV
ADDRESS
18
t
AVEL
E
17
t
AVEH
W
13
t
WLEH
15
t
DVEH
DATA IN
DATA VALID
14
t
ELEH
19
t
EHAX
16
t
EHDX
DATA OUT
HIGH IMPEDANCE
4-56
STK12C68-M
NONVOLATILE MEMORY OPERATION
MODE SELECTION
E
H
L
L
L
W
X
H
L
H
HSB
H
H
H
H
A
12
- A
0
(hex)
X
X
X
0000
1555
0AAA
1FFF
10F0
0F0F
L
H
H
0000
1555
0AAA
1FFF
10F0
0F0E
X
X
L
X
MODE
Not Selected
Read SRAM
Write SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile
STORE
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Read SRAM
Nonvolatile
RECALL
I/O
Output High Z
Output Data
Input Data
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Output Data
Output Data
Output Data
Output Data
Output Data
Output High Z
Output High Z
I
CC2
/Standby
Active
POWER
Standby
Active
Active
Active
k,l
k,l
k,l
k,l
k,l
k
k,l
k,l
k,l
k,l
k,l
k
m
l
NOTES
STORE/Inhibit
Note k: The six consecutive addresses must be in order listed - (0000, 1555, 0AAA, 1FFF, 10F0, 0F0F) for a
STORE
cycle or (0000, 1555, 0AAA, 1FFF, 10F0,
0F0E) for a
RECALL
cycle. W must be high during all six consecutive cycles. See
STORE
cycle and
RECALL
cycle tables and diagrams for further details.
Note l: I/O state assumes that G
≤
V
IL
. Activation of nonvolatile cycles does not depend on the state of G.
Note m: HSB initiated
STORE
operation actually occurs only if a WRITE has been done since last
STORE
operation. After the
STORE
(if any) completes, the
part will go into standby mode inhibiting all operation until HSB rises.
HARDWARE
STORE
/RECALL
SYMBOLS
NO.
22
23
24
25
26
t
RECALL
t
STORE
t
DELAY
t
RECOVER
t
ASSERT
V
SWITCH
I
HSB_OL
I
HSB_OH
Note e:
Note n:
Note o:
t
HLHH
t
HLQZ
t
HHQX
t
HLHX
PARAMETER
MIN
MAX
20
10
1
300
250
4.0
3
5
60
4.5
UNITS
µs
ms
µs
ns
ns
V
mA
µA
HSB = V
OL
, Note e, n
HSB = V
IL
, Note e, n
Note e
Note e
NOTES
Note o
V
CC
≥
4.5V
RECALL
Cycle Duration
STORE
Cycle Duration
HSB Low to Inhibit On
HSB High to Inhibit Off
External
STORE
Pulse Width
Low Voltage Trigger Level
HSB Output Low Current
HSB Output High Current
These parameters guaranteed but not tested.
HSB is an I/O that has a weak internal pullup; it is basically an open drain output. It is meant to allow up to 32 STK12C68-Ms to be ganged together for
simultaneous storing. Do not use HSB to pullup any external circuitry other than other STK12C68-M HSB pins.
A RECALL cycle is initiated automatically at power up when V
The heat generated by electronic equipment during operation causes the internal temperature of the equipment to rise rapidly. If the heat is not dissipated in time, the equipment will continue to heat...
The PC and ARM board are connected through a serial line. I have read about the serial communication of VC these two days and have a general understanding of the sending and receiving data operations ...
[i=s]This post was last edited by 灞波儿奔 on 2017-3-15 22:45[/i] [p=30, null, left]TI's Bluetooth + MSP430 audio heat sink reference design can be used by customers to create a variety of low-end, low-po...
[color=rgb(51, 51, 51)][font="]/* Drive capability of MSP430 I/O port*/[/font][/color] [color=rgb(51, 51, 51)][font="]The maximum output or absorption current of each I/O port is 6mA[/font][/color] [c...
As the number of cars increases, environmental pressures are also increasing. At this time, some people are saying that new energy vehicles are energy-efficient and environmentally friendly, and ar...[Details]
On August 21st, Zhiyuan Robotics revealed at its first partner conference that it expects shipments to reach thousands of units this year and tens of thousands next year. The company hopes to reach...[Details]
Based on the commutation technology, thyristor rectifiers are classified into two main types. Line-commutated and force-commutated inverters are commonly used, while other commutated inverters, nam...[Details]
Compared to cloud databases, minicomputers are purpose-built for decentralized, rugged computing at the edge of the network. By moving applications, analytics, and processing services closer to the...[Details]
The MCX E series is the most reliability- and safety-focused series in NXP's extensive MCX product portfolio.
With the launch of this series, NXP has further enriched its 5V-compatible MCU pr...[Details]
In the period after the switching power supply achieved the "20 kHz" revolution in the 1970s, although improvements and enhancements were made in circuit technology, the development level of the se...[Details]
Previously, Positive Motion Technology shared with you the firmware upgrade of motion controller, ZBasic program development, ZPLC program development, communication with touch screen and input/out...[Details]
For new energy vehicles, the importance of batteries is unquestionable. Not only does it determine the performance of the vehicle, but the battery density also has a great relationship with the veh...[Details]
introduction
In recent years, multi-touch has emerged as a new alternative to traditional human-computer interaction. It eliminates the need for keyboards and mice, enabling simultaneous inter...[Details]
As a pioneer in the new smart home concept, robot vacuums have captured a significant market share. Robot vacuums, also known as automatic sweepers, smart vacuums, or robot vacuums, are smart home ...[Details]
Silicon Labs (also known as "Silicon Labs"), an innovative leader in low-power wireless connectivity, will showcase its cutting-edge artificial intelligence (AI) and Internet of Things (IoT) solu...[Details]
Pure electric vehicles have experienced rapid growth in recent years, and many consumers now consider them as a top choice when purchasing a car. But do you know how to choose a satisfactory and sa...[Details]
Amid the rapid advancement of automotive intelligence, on-board storage has become a thorny bottleneck restricting the "large-scale popularization" of advanced assisted driving.
On the o...[Details]
Currently, PLCs are widely used in various industries, including special machine tools, machine tools, control systems, building automation, steel, petrochemicals, electricity, building materials, ...[Details]
PCB Design
京公网安备 11010802033920号
EEWORLD
