C515C_9711 Datasheet, PDF (17/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Introduction
C515C
Table 1-1
Pin Definitions and Functions (cont’d)
Symbol
HWPD
Pin Number
P-MQFP-80
69
VCC1
33
VSS1
34
VCCE1
32
VCCE2
68
VSSE1
35
VSSE2
70
VCCEXT
50
VSSEXT
51
VCCCLK
14
VSSCLK
13
N.C.
2, 71
*) I = Input
O = Output
I/O*⁾ Function
I
Hardware Power Down
A low level on this pin for the duration of one machine
cycle while the oscillator is running resets the C515C.
A low level for a longer period will force the part to power
down mode with the pins floating.
– 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.
– 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.
– 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.
– 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.
– 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).
– 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).
– Supply voltage for on-chip oscillator
This pin is used for power supply of the on-chip oscillator
circuit.
– Ground (0 V) for on-chip oscillator
This pin is used for ground connection of the on-chip
oscillator circuit.
– Not connected
These pins should not be connected.
Semiconductor Group
1-10
1997-11-01