参数资料
| 型号： | X40414V8-A |
| 厂商： | Intersil |
| 文件页数： | 4/24页 |
| 文件大小： | 0K |
| 描述： | IC VOLTAGE MON DUAL W/SUP 8TSSOP |
| 标准包装： | 100 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 1.3V，2.9V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
X40410, X40411, X40414, X40415
Figure 2. V TRIPX Set/Reset Conditions
V TRIPX
(X = 1, 2)
V CC /V2MON
V P
WDO
SCL
0
7
0
7
0
7
SDA
A0h
00h
t WC
WATCHDOG TIMER
The Watchdog Timer circuit monitors the microprocessor
activity by monitoring the SDA and SCL pins. The micro-
processor must toggle the SDA pin HIGH to LOW period-
ically, while SCL also toggles from HIGH to LOW (this is
a start bit) followed by a stop condition prior to the expira-
tion of the watchdog time out period to prevent a WDO
signal going active. The state of two nonvolatile control
bits in the Status Register determines the watchdog timer
period. The microprocessor can change these watchdog
bits by writing to the X40410/11/14/15 control register
(also refer to page 19).
Figure 3. Watchdog Restart
Setting a V TRIPx Voltage (x = 1, 2)
There are two procedures used to set the threshold
voltages (V TRIPx ), depending if the threshold voltage
to be stored is higher or lower than the present value.
For example, if the present V TRIPx is 2.9 V and the
new V TRIPx is 3.2 V, the new voltage can be stored
directly into the V TRIPx cell. If however, the new setting
is to be lower than the present setting, then it is neces-
sary to “reset” the V TRIPx voltage before setting the
new value.
Setting a Higher V TRIPx Voltage (x = 1, 2)
To set a V TRIPx threshold to a new voltage which is
higher than the present threshold, the user must apply
SCL
SDA
.6μs
1.3μs
Timer Start
the desired V TRIPx threshold voltage to the corre-
sponding input pin Vcc(V1MON), or V2MON. The
Vcc(V1MON) and V2MON must be tied together dur-
ing this sequence. Then, a programming voltage (Vp)
must be applied to the WDO pin before a START con-
dition is set up on SDA. Next, issue on the SDA pin the
Slave Address A0h, followed by the Byte Address 01h
for V TRIP1 and 09h for V TRIP2 , and a 00h Data Byte in
order to program V TRIPx . The STOP bit following a
V1 AND V2 THRESHOLD PROGRAM PROCEDURE
(OPTIONAL)
The X40410/11/14/15is shipped with standard V1 and
V2 threshold (V TRIP1, V TRIP2 ) voltages. These values
will not change over normal operating and storage
conditions. However, in applications where the stan-
dard thresholds are not exactly right, or if higher preci-
sion is needed in the threshold value, the
X40410/11/14/15 trip points may be adjusted. The pro-
cedure is described below, and uses the application of
a high voltage control signal.
4
valid write operation initiates the programming
sequence. Pin WDO must then be brought LOW to
complete the operation.
Note: This operation does not corrupt the memory
array.
Setting a Lower V TRIPx Voltage (x = 1, 2)
In order to set V TRIPx to a lower voltage than the
present value, then V TRIPx must first be “reset” accord-
ing to the procedure described below. Once V TRIPx
has been “reset”, then V TRIPx can be set to the desired
voltage using the procedure described in “Setting a
Higher V TRIPx Voltage”.
FN8116.0
March 28, 2005
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