p87c51mc2ba/02 NXP Semiconductors, p87c51mc2ba/02 Datasheet - Page 7

• Manufacturer Part Number: p87c51mc2ba/02
• Description: 80c51 8-bit Microcontroller Family With Extended Memory
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 2:
9397 750 12302
Product data
Symbol
P0.0 - P0.7
P1.0 - P1.7
Pin description
Pin
43 - 36
2 - 9
2
3
4
5
6
7
8
9
7.2 Pin description
Type
I/O
I/O
I/O
I
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Description
Port 0: Port 0 is an open drain, bidirectional I/O port. Port 0 pins that have 1s
written to them float and can be used as high-impedance inputs. Port 0 is also
the multiplexed low-order address and data bus during accesses to external
program and data memory. In this application, it uses strong internal pull-ups
when emitting 1s.
Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups on all pins.
Port 1 pins that have 1s written to them are pulled HIGH by the internal pull-ups
and can be used as inputs. As inputs, port 1 pins that are externally pulled LOW
will source current because of the internal pull-ups.
•
•
•
•
•
•
•
•
•
•
P1.0, T2
P1.1, T2EX
P1.2, ECI
P1.3, CEX0
P1.4, CEX1
MOSI
P1.5, CEX2
SPICLK
P1.6, CEX3
P1.7, CEX4
– Timer/Counter 2 external count input/Clock out
– Timer/Counter 2 Reload/Capture/Direction Control
– External Clock Input to the PCA
– Capture/Compare External I/O for PCA module 0
– Capture/Compare External I/O for PCA module 1 (with pull-up on pin)
– SPI Master Out/Slave In (Selected when SPEN (SPCTL.6) is ‘1’, in which
– Capture/Compare External I/O for PCA module 2 (with pull-up on pin)
– SPI Clock (Selected when SPEN (SPCTL.6) is ‘1’, in which case the
– Capture/Compare External I/O for PCA module 3
– Capture/Compare External I/O for PCA module
Rev. 03 — 13 November 2003
case the pull-up for this pin is disabled)
pull-up for this pin is disabled)
P87C51MB2/P87C51MC2
80C51 8-bit microcontroller family
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
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