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參數(shù)資料
| 型號： | M37512F8H-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 43/89頁 |
| 文件大?。?/td> | 877K |
| 代理商： | M37512F8H-XXXHP |
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Feb 18, 2005
page 46 of 85
REJ03B0122-0101
7512 Group
OVER CURRENT DETECTOR
Over current detector detects the over current which flows through
the sense resistor connected between ISENS1 pin and ISENS0
pin, and turn off the discharge control FET to stop battery from dis-
charging or charging. In the low power state, and when current
integrator disables, wake up current detector which detects ap-
proximate 1mA current and generates the interrupt is also built-in.
Discharge Short Current Detector
Discharge short current detector detects the discharge short
current(10A-47.5A) with 10m
sense resistor. Setting discharge
short current detect enable bit of the discharge short current de-
tect control register(000F16) “1”, discharge short current detector
starts the operation. The compare voltage is determined by setting
the discharge short current detect voltage select bit of the dis-
charge short current detect control register, and the detect time is
determined by setting the discharge short current detect time set
up bit of the current detect time set up register 1(001116).
The potential difference between sense resistor exceeds the com-
pare voltage and continue more than detect time, then discharge
short current detect flag(bit 2 of 001316) becomes “1”, and dis-
charge short current detect interrupt occurs.
Enabling interrupt for discharge short current detect is determined
by discharge short current interrupt enable bit(bit 4 of 000F16).
And in case of the FET control enable bit is “1”, The FET control
signal is generated from DFETCNT pin with discharge short cur-
rent interrupt. The polarity of the FET control signal is determined
by setting the discharge FET control polarity switch bit(bit 5 of
000F16).
Setting the discharge short current detect restart bit(bit 6 of
001316) “1” makes the discharge short current detect state clear.
Discharge Over Current Detector
Discharge over current detector detects the discharge over
current(5A-20.5A) with 10m
sense resistor. Setting discharge
over current detect enable bit of the discharge over current detect
control register(001016) “1”, discharge over current detector starts
the operation. The compare voltage is determined by setting the
discharge over current detect voltage select bit of the discharge
over current detect control register(001016), and the detect time is
determined by setting the discharge over current detect time set
up bit of the current detect time set up register 1(001116).
The potential difference between sense resistor exceeds the com-
pare voltage and continue more than detect time, then discharge
over current detect flag(bit 1 of 001316) becomes “1”, and dis-
charge over current detect interrupt occurs.
Enabling interrupt for discharge over current detect is determined
by discharge over current interrupt enable bit. And in case of the
discharge FET control enable bit is “1”, the FET control signal is
generated from DFETCNT pin with discharge over current inter-
rupt.
Setting the discharge overt current detect restart bit(bit5 of
001316) “1” makes the discharge over current detect state clear.
Wake Up Current Detector
Wake up current detector detects approximate 1A current with
10m
sense resistor. Setting wake up current detect enable bit of
the wake up current detect control register 1(001216) “1”, wake up
current detector starts the operation. The sensing voltage is 10
times amplified and compared by the comparator. The comparator
is comparing every 3.9msec, and more than 1A current is keeping
for about 62msec, wake up current detect flag(bit 0 of 001316) be-
comes “1”, and the wake up current detect interrupt occurs. The
enabling interrupt for wake up current detect is determined by
wake up current detect interrupt enable bit(bit6 of 001216). Setting
the wake up current detect restart bit “1” makes the wake up cur-
rent detect state clear.
The offset calibration of the amplifier and comparator is able to be
adjusted by setting the wake up current compare voltage select
bit. Setting the wake up current detect calibration enable bit(bit5 of
001416) “1”, calibration mode starts. In the calibration mode, input
of level shift circuit is connected to internal GND, and it is possible
to measure the comparator threshold voltage at 0V input state,
with setting wake up current detect compare voltage select bit.
Then set the wake up current detect compare voltage select bit
the value which is added comparator threshold voltage at 0V state
and 0.1V(1A worth voltage).
Charge Over Current Detector
Charge over current detector detects the charge over current
(10A-25A) with 10m
sense resister. Setting charge over current
detect enable bit of the charge over current detect control register
(0FF016) "1", charge over current detector starts the operation.
The compare voltage is determined by setting the charge over
current detect voltage select bit of the charge over current detect
control register (0FF016), and the detect time is determined by set-
ting the charge over current detect time set up bit of the current
detect time set up register 2 (0FF116).
The potential difference between sense resister exceeds the com-
pare voltage and continue more than detect time, then charge
over current detect flag (bit 3 of 001316) becomes "1", and charge
over current detect interrupt occurs.
Enabling interrupt for charge over current detect is determined by
charge over current interrupt enable bit. And in case of the charge
FET control enable bit is "1", the charge FET control signal is gen-
erated from CFETCNT pin with charge over current interrupt. The
polarity of the FET control signal is determined by setting the
charge FET control polarity switch bit (bit 5 of 0FF016).
Setting the charge over current detect restart bit (bit 7 of 001316)
"1" makes the charge over current detect state clear.
SFR Protect Control Register
SFR protect control register(002916), bit of MISRG2 (003716) and
bit4,5 of MISRG (003816) protect SFR from changing the contents
easily cause of like microcomputer runs away.
When the bit of SFR protect control register bit of MISRG2, bit 4,5
of MISRG is “0”, corresponded bit register is protected. Writing to
the protected register, write “1” to the corresponded bit of protect
register, then write the protected register in succession. If other
register is written, the contents of SFR protect register is cleared
“00”.
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| M37512F8HP | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| M37513EFFS | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CQCC100 |
| M37513M8-XXXGP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37512F8-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCHHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCH-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FC-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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