HP 525 5/XX, 520 5/XX manual Devices on the ISA Bus, Super I/O Chip NS 87308 or NS, Functions

2 System Board - (SiS Chipset) (Part Number: D4051-63001)

Devices on the ISA Bus

Devices on the ISA Bus

Super I/O Chip (NS 87308 or NS 87307)

The basic input/output control functions are provided by the Super I/O chip, the NS 87308 or NS 87307. The Super I/O chip is contained within a 160-pin PQFP package. The chip provides the control for the following devices:

Logical	Functions
Device
0	Keyboard controller
1	Mouse controller
2	RTC and Advanced Power supply Controller (APC)
3	Floppy disk controller
4	Parallel port controller
5	UART2 & IR controller
6	UART1 controller
7	GPIO
8	Power management

The Super I/O chip incorporates one Plug and Play compatible chip, is 100% compatible with the ISA architecture, and provides:

•An integrated floppy drive controller.

•A keyboard controller.

•A mouse controller.

•A real-time clock (RTC).

•Two UART’s (serial ports ).

•An IEEE1284 parallel port.

•Three general purpose chip select signals

•General purpose I/O register set.

•An X-bus data buffer that connects the 8-bit X data bus to the ISA data bus.

•Non-Volatile Memory (NVM) support via the Chip Select 0 (CS0) signal that is powered by the VCCH.

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