Keyboard
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| Windows logo key |
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| Yes |
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| Internal & external keyboard work |
| Yes |
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| simultaneously |
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| Battery |
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| Vendor & model name |
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| Panasonic/Sanyo |
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| Battery Type |
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| Pack capacity |
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| 60Wh |
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| Cell voltage |
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| 3.7V/cell/2000mAh High discharge rate |
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| Number of battery cell |
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| 8 |
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| Package configuration |
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| Pin 1 |
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| BATT+: Battery+, Battery Positive Terminal |
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| Pin 2 |
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| Pin 3 |
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| ID : Identify Pin (Note 1) |
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| Pin 4 |
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| B/I : |
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| Pin 5 |
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| TS : Connect to Thermister |
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| Pin 6 |
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| SMD : SMBus data interface I/O pin |
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| Pin 7 |
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| SMC : SMBus clock interface I/O pin |
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| Pin 8 |
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| GND : Battery Negative Terminal |
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| Pin 9 |
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| NOTE: 1. |
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| NOTE: B/I pin: Battery can be Charged/Discharged only while this pin is connected to GND. |
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| LCD Inverter Specification |
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| No. |
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| Model | Type | Frequency | Current | VS at 0° C | Work | Brightness | |||
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| (KHz) | (mA) | Voltage | ||||||||
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| 1 |
| LG |
| LP171W0 | 17” WXGA | 45/60/70 | 3.5/6/6.5 | 1500Vrms | 750 Vrms | 130/160 | |||
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| at 6mA |
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| 2 |
| Samsung |
| LTN170W | 17”WXGA | 55/60/65 | 4/6/6.5 | 1800Vrms | 730 Vrms | 145/170 | |||
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| at 6mA |
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| 3 |
| AU |
| B170PW0 | 17”WXGA | 50/60/70 | 1500 Vrms | 785 Vrms | 160/190 | ||||
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| 1 |
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| at 6mA |
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| 4 |
| LG |
| LP171W0 | 17”WXGA | 40/60/80 | 3/6.5/7 | 1560 Vrms | 720 Vrms | 145/170 | |||
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| at 6.5mA |
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There are two control signals that come form system to control lamp brightness. One signal is named DAC_BRIG, which limits current to meet LCD lamp current specification. Another one is named PWM, which adjusts lamp brightness. This inverter brightness is adjusted by PWM burst mode. The PWM burst mode is to turn on and off the lamp at rate of 150Hz. The effective brightness is varied with the duty cycle.
26 | Chapter 1 |
