Philips psa[cd ACT500, Руководство по обслуживанию

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3 - 3
Name No. I/O
Other
Function
Function Description
P80
P81
P82
P83
P84
P85
P86
P87 78
77
76
75
74
73
72
71 I/O D0, SEG2
D1, SEG3
D2, SEG4
D3, SEG5
D4, SEG6
D5, SEG7
D6, SEG8
D7, SEG9 I/O port 8 8-bit CMOS tri-state I/O port.
Each individual bit can be switched to an input or output
by the P8DIR register. A pull-up resistor for each bit can
be selected individually by the P8PLU register.
At reset, when single-chip mode is selected, the input
mode is selected and pull-up resistors for P80 to P87
are disabled (high impedance output).
When configured as outputs, these pins can drive
segments.
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7 16
17
18
19
20
21
22
23
Input AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7 Input port A 8-bit input port.
A pull-up or pull-down resistor for each bit can be
selected individually by the PAPLUD resister. However,
pull-up and pull-down resistors cannot be mixed.
At reset, the PA0 to PA7 input mode is selected and
pull- up resistors are disabled.
SBO0
SBO1 25
28 Output P00, TXD
P03 Serial interface
transmission data
output pins
Transmission data input pins for serial interfaces 0 to
1.
The output configuration, either CMOS push-pull or n-
channel open-drain can be selected. Pull-up resistors
can be selected by the P0PLU register. Select output
mode by the P0DIR register and serial data output
m o d e b y s e r i a l m o d e r e g i s t e r ( S C 0 M D 3 a nd
SC1MD1).
These can be used as normal I/O pins when the serial
interface is not used.
SBI0
SBI1 26
29 Input P01, RXD
P04 Serial interface
reception data
input pins Receive data input pins for serial interfaces 0 to 1.
Pull-up resi stors can be selected by the P0PLU
register Select input mode by the P0DIR register, and
s e ri a l i np ut mo d e b y the s e ri a l mo d e re g i s te r
(SC0MD3 and SC1MD1).
These can be used as normal I/O pins when the serial
interface is not used.
SBT0
SBT1 27
30 I/O P02
P05 Serial interface
clock I/O pins Clock I/O pins for serial interfaces 0 to 1.
The output configuration, either CMOS push-pull or n-
cha nne l o p e n-d ra i n ca n b e se le c te d . P ush-p ull
resistors can be selected by the P0PLU register.
Select clock I/O for each communication mode by the
P0DIR register and serial mode register (SC0MD3
and SC1MD1).
These can be used as normal I/O pins when the serial
interface is not used.
PIN DESCRIPTIONS OF IC
MCU MN101C39C_399