83C055 Philips Semiconductors, 83C055 Datasheet - Page 6

• Manufacturer Part Number: 83C055
• Description: Microcontrollers for TV and video MTV
• Manufacturer: Philips Semiconductors

Philips Semiconductors
6.2
Table 2 Pin description SDIP42 (SOT270-1)
1996 Mar 22
Port 0 (notes 1, 2 and 4)
P0.0/TDAC/V
P0.1/PWM1/PROG
P0.2/PWM2/ASEL
P0.3/PWM3
to
P0.7/PWM7
Port 1 (notes 1, 2 and 5)
P1.0/ADI0
to
P1.2/ADI2
P1.3/PWM0
Port 2
P2.7 to P2.0
Port 3 (note 1 and 3)
P3.0
P3.1/INT1
P3.2/T0
P3.3/INT0
P3.4 to P3.7
General
V
VID2 to VID0
VCTRL
SS
Microcontrollers for TV and video (MTV)
SYMBOL
Pin description
PP
13 to 20 Port 2: 8-bit open-drain bidirectional port; P2.3 to P2.0 have high current capability
38 to 41 P3.4 to P3.7: 4 open-drain bidirectional port lines.
22 to 24 Digital Video bus: Three totem-pole outputs comprising digital RGB (or other colour
9 to 11
4 to 8
PIN
12
34
35
36
37
21
25
1
2
3
P0.0: open-drain bidirectional port line;
TDAC: output for the 14-bit high-precision PWM;
V
P0.1: open-drain bidirectional port line;
PWM1: output for the 6-bit lower-precision PWM;
PROG: input for EPROM programming pulses.
P0.2: open-drain bidirectional port line;
PWM2: output for the 6-bit lower-precision PWM;
ASEL: input indicating the EPROM address bits that are applied to Port 2.
P0.3 to P0.7: 5 open-drain bidirectional port lines;
PWM3 to PWM7: 5 outputs for the 6-bit lower-precision PWM.
P1.0 to P1.2: 3 open-drain bidirectional port lines;
ADI0 to ADI2: inputs for the software analog-to-digital facility.
P1.3: open-drain bidirectional port line; PWM0: output for the 6-bit lower-precision
PWM. PWM0 can be externally pulled up as high as +12 V 5%
(10 mA at 0.5 V) for driving LEDs. Port 2 pins that have logic 1s written to them float,
and in that state can be used as high-impedance inputs. Any of the Port 2 pins are
driven LOW if the port register bit is written as a logic 0. The state of the pin can
always be read from the port register by the program.
P3.0: open-drain bidirectional port line.
P3.1: open-drain bidirectional port line; INT1: External interrupt 1.
P3.2: open-drain bidirectional port line; T0: Timer 0 external input.
P3.3: open-drain bidirectional port line; INT0: External interrupt 0.
Ground: 0 V reference.
encoding) from the OSD facility. The polarity of these outputs is controlled by a
programmable register bit (register OSCON; bit Po).
Video Control: A totem-pole output indicating whether the OSD facility is currently
presenting active video on the VID2 to VID0 outputs. Signal is used to control an
external multiplexer (mixer) between normal video and the video derived from VID2 to
VID0. The polarity of this output is controlled by a programmable register bit (register
OSCON; bit Pc).
PP
: 12 V programming supply voltage during EPROM programming.
6
DESCRIPTION
83C145; 83C845
83C055; 87C055
Product specification