SAB88C166W-5M datasheet(5/58 Pages) SIEMENS

Part #	SAB88C166W-5M

Description	16-Bit CMOS Single-Chip Microcontrollers with/without oscillator prescaler with 32 KByte Flash EPROM

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

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SAB 88C166(W)

Semiconductor Group

4

Pin Definitions and Functions

Symbol

Number

Input (I)

Output (O)

Function

P4.0 –

P4.1

16 - 17

16

17

I/O

O

Port 4 is a 2-bit bidirectional I/O port. It is bit-wise

programmable for input or output via direction bits. For a pin

configured as input, the output driver is put into high-

impedance state.

In case of an external bus configuration, Port 4 can be used to

output the segment address lines:

P4.0

A16

Least Significant Segment Addr. Line

P4.1

A17

Most Significant Segment Addr. Line

XTAL1

XTAL2

20

19

I

O

XTAL1:

Input to the oscillator amplifier and input to the

internal clock generator

XTAL2:

Output of the oscillator amplifier circuit.

To clock the device from an external source, drive XTAL1,

while leaving XTAL2 unconnected. Minimum and maximum

high/low and rise/fall times specified in the AC Characteristics

must be observed.

BUSACT,

EBC1,

EBC0

VPP

22

23

24

23

I

External Bus Configuration selection inputs. These pins are

sampled during reset and select either the single chip mode

or one of the four external bus configurations:

BUSACT EBC1

EBC0

Mode/Bus Configuration

0

8-bit demultiplexed bus

0

1

8-bit multiplexed bus

0

1

0

16-bit muliplexed bus

0

1

16-bit demultiplexed bus

1

0

Single chip mode

1

0

1

Reserved.

1

0

Reserved.

1

Reserved.

After reset pin EBC1 accepts the programming voltage for the

Flash EPROM as an “alternate function”:

Flash EPROM Programming Voltage VPP = 12 V.

RSTIN

27

I

Reset Input with Schmitt-Trigger characteristics. A low level at

this pin for a specified duration while the oscillator is running

resets the SAB 88C166(W). An internal pullup resistor permits

power-on reset using only a capacitor connected to

V

SS.

RSTOUT 28

O

Internal Reset Indication Output. This pin is set to a low level

when the part is executing either a hardware-, a software- or a

watchdog timer reset. RSTOUT remains low until the EINIT

(end of initialization) instruction is executed.

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SAB88C166W-5M Datasheet(PDF) 5 Page - Siemens Semiconductor Group

SAB88C166W-5M Datasheet(HTML) 5 Page - Siemens Semiconductor Group

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