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| 型号： | PS700-I/ST |
| 厂商： | Microchip Technology |
| 文件页数： | 17/38页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MONITOR LI-ION 8TSSOP |
| 标准包装： | 100 |
| 功能： | 电池监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.7 V ~ 9 V |
| 工作温度： | -20°C ~ 85°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 |
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PS700
4.4.4
CTC – CHARGE TIME COUNT
The TAT register will rollover if it is allowed to count
REGISTER
CTC records the length of accumulated time that the
battery is in a charge condition as indicated by a posi-
tive voltage on the SR pin. This register is incremented
using a 2 Hz internal clock rate; therefore, the CTC is
incremented at the rate of 2 counts per second or 7200
counts per hour so long as current accumulation is
enabled and the Ires register returns a ‘ 0 ’ in the sign bit
following a current conversion.
The CTC register will rollover if it is allowed to count
beyond 0xFFFFFFFF; therefore, proper register
maintenance by the host system is necessary. The
CTC register may be cleared using the ACCclr register
bit, CLR3, described below.
beyond 0xFFFFFFFF; therefore, proper register
maintenance by the host system is necessary. The TAT
register may be cleared using the ACCclr register bit,
CLR5, described below.
4.4.7 VC2A – VC2 ACCUMULATOR
VC2A is a 32-bit register that holds the total
accumulated value measured on the VC2 pin. At the
completion of each measurement, VC2A is
incremented by the value of VC2res. This function is
enabled when the Accumctrl register, bit AccV is a ‘ 1 ’.
The VC2A register will rollover if it is allowed to count
beyond 0xFFFFFFFF; therefore, proper register main-
tenance by the host system is necessary. The VC2A
register may be cleared using the ACCclr register bit,
4.4.5
TA – TEMPERATURE
CLR6, described below.
ACCUMULATOR
TA is the accumulated 32-bit value of temperature
measurements from the internal or external tempera-
ture sensor. TA is updated by the Itres or ETres
registers. Selection of the internal temperature sensor,
or external thermistor connected to the NTC pin, is
made in the Accumctrl register, bit tsel.
The TA register will rollover if it is allowed be updated
beyond 0xFFFFFFFF; therefore, proper register
maintenance by the host system is necessary. The TA
register may be cleared using the ACCclr register bit,
CLR4, described below.
4.4.8 VC2T – VC2 TIME COUNT
REGISTER
VC2T records accumulated time for which
measurements are taken on the VC2 pin. This register
is incremented using a 2 Hz internal clock rate; there-
fore, VC2T is incremented at the rate of 2 counts per
second or 7200 counts per hour.
The VC2T register will rollover if it is allowed to count
beyond 0xFFFFFFFF; therefore, proper register main-
tenance by the host system is necessary. The VC2T
register may be cleared using the ACCclr register bit,
CLR7, described below.
4.4.6
TAT – TEMPERATURE TIME COUNT
REGISTER
The TAT register records the length of accumulated
time that the PS700 is sensing temperature and accu-
mulating the value in register TA. TAT is incremented
using a 2 Hz internal clock rate and is incremented at
the rate of 2 counts per second, or 7200 counts per
hour, as long as temperature accumulation is enabled.
? 2004 Microchip Technology Inc.
DS21760F-page 17
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