C515C Datasheet, PDF (13/69 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C515C
Table 1
Pin Definitions and Functions (cont’d)
Symbol
VSSCLK
VCCCLK
VCCE1
VCCE2
VSSE1
VSSE2
VCC1
VSS1
VCCEXT
VSSEXT
N.C.
*) I = Input
O = Output
Pin Number
P-MQFP-80
13
14
32
68
35
70
33
34
50
51
2, 71
I/O*) Function
– Ground (0 V) for on-chip oscillator
This pin is used for ground connection of the on-chip
oscillator circuit.
– Supply voltage for on-chip oscillator
This pin is used for power supply of the on-chip oscillator
circuit.
– 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 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 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).
– Not connected
These pins should not be connected.
Semiconductor Group
13
1997-07-01