C515C datasheet(13/69 Pages) SIEMENS

13 / 69 page

Semiconductor Group

1997-07-01

C515C

VSSCLK

–

Ground (0 V) for on-chip oscillator

This pin is used for ground connection of the on-chip

oscillator circuit.

VCCCLK

–

Supply voltage for on-chip oscillator

This pin is used for power supply of the on-chip oscillator

circuit.

VCCE1

VCCE2

–

Supply voltage for I/O ports

These pins are used for power supply of the I/O ports

during normal, idle, and power-down mode.

VSSE1

VSSE2

–

Ground (0 V) for I/O ports

These pins are used for ground connections of the I/O

ports during normal, idle, and power-down mode.

VCC1

–

Supply voltage for internal logic

This pins is used for the power supply of the internal logic

circuits during normal, idle, and power down mode.

VSS1

–

Ground (0 V) for internal logic

This pin is used for the ground connection of the internal

logic circuits during normal, idle, and power down mode.

VCCEXT

–

Supply voltage for external access pins

This pin is used for power supply of the I/O ports and

control signals which are used during external accesses

(for Port 0, Port 2, ALE, PSEN, P3.6/WR, and P3.7/RD).

VSSEXT

–

Ground (0 V) for external access pins

This pin is used for the ground connection of the I/O ports

and control signals which are used during external

accesses (for Port 0, Port 2, ALE, PSEN, P3.6/WR, and

P3.7/RD).

N.C.

2, 71

–

Not connected

These pins should not be connected.

*) I = Input

O = Output

Table 1

Pin Deﬁnitions and Functions (cont’d)

Symbol

Pin Number

I/O*)

Function

P-MQFP-80

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