Hyundai HPT-4205, Руководство по обслуживанию

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9
Plasma TV Service Manual 14/03/2005
20 TP1 (I) Test point 1
21-27 X0-X6 (IPU) Sense inputs from key matrix
28 VDD(I) Voltage supply
Note:
(I): Input,
(IPU): input with p-channel pull-up transistor,
(ODN): output with open drain n-channel transistor
(OD3): output 3-state
12.6. 24C32A
12.6.1. Features
• Voltage operating range: 4.5V to 5.5V
- Maximum write current 3 mA at 5.5V
- Standby current 1 mA typical at 5.0V
• 2-wire serial interface bus, I
2
C
TM
compatible
• 100 kHz and 400 kHz compatibility
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Hardware write protect
• 1,000,000 Erase/Write cycles guaranteed
• 32-byte page or byte write modes available
• Schmitt trigger filtered inputs for noise suppression
• Output slope control to eliminate ground bounce
• 2 ms typical write cycle time, byte or page
• Up to eight devices may be connected to the same bus for up to 256K bits total memory
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP and SOIC packages
• Temperature ranges
- Commercial (C): 0°C to 70°C
- Industrial (I): -40°C to +85°C
- Automotive (E): -40°C to +125°C
12.6.2. Description
The Microchip Technology Inc. 24C32A is a 4K x 8 (32K bit) Serial Electrically Erasable PROM. It has
been developed for advanced, low power applications such as personal communications or data
acquisition. The 24C32A also has a page-write capability of up to 32 bytes of data. The 24C32A is
capable of both random and sequential reads up to the 32K boundary. Functional address lines allow
up to eight 24C32A devices on the same bus, for up to 256K bits address space. Advanced CMOS
technology and broad voltage range make this device ideal for low-power/low-voltage, non-volatile code
and data applications. The 24C32A is available in the standard 8-pin plastic DIP and both 150 mil and
200 mil SOIC packaging.
12.6.3. Pin Function table
Name Function
A0, A1, A2 User Configurable Chip Selects
V
ss
Ground
SDA Serial Address/Data I/O
SCL Serial Clock
WP Write Protect Input
V
cc
+4.5V to 5.5V Power Supply