Q67100-H6486 データシートの表示（PDF） - Siemens AG

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Q67100-H6486

Data Communications ICs

Siemens AG 

SAB 82525

SAB 82526

SAF 82525

SAF 82526

1.1 Pin Definitions and Functions

Pin No.

Symbol Input (I) Function

P-LCC P-MQFP

Output (O)

42 3

D0

I/O

43 4

D1

44 5

D2

16

D3

27

D4

38

D5

49

D6

5 10 D7

Data Bus

The data bus lines are bidirectional threestate lines which

interface with the system’s data bus.

These lines carry data and command/status to and from

the HSCX.

6 11 RD/IC1 I

Read, Intel bus mode, IM1 connected to low

This signal indicates a read operation. When the HSCX is

selected via CS the read signal enables the bus drivers to

put data from an internal register addressed via A0-A6 on

the data bus.

When the HSCX is selected for DMA transfers via DACK,

the RD signal enables the bus driver to put data from the

respective receive FIFO on the data bus. Inputs to A0-A6

are ignored.

Input Control 1, Motorola bus mode IM1 connected to

high.

If Motorola bus mode has been selected this pin serves

either as

E = Enable, active high (IM0 tied to low) or

DS = Data Strobe, active low (IM0 tied to high)

input (depending on the selection via IM0) to control read/

write operations.

7 12 WR/IC0 I

Write, Intel bus mode

This signal indicates a write operation. When CS is active

the HSCX loads an internal register with data provided via

the data bus. When DACK is active for DMA transfers the

HSCX loads data from the data bus on the top of the

respective transmit FIFO.

Input Control Motorola bus mode

In Motorola bus mode, this pin serves as the R/W input to

distinguish between read or write operations.

8 13 CS

I

Chip Select

A low signal selects the HSCX for a read/write operation.

Semiconductor Group

10

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