Philips ACT-500 Service Manual page 13

PIN DESCRIPTIONS OF IC
MCU MN101C39C_399
Name No.
P80 78 I/O
P81 77
P82 76
P83 75
P84 74
P85 73
P86 72
P87 71
PA0 16 Input
PA1 17
PA2 18
PA3 19
PA4 20
PA5 21
PA6 22
PA7 23
SBO0 25 Output
SBO1 28
SBI0 26 Input
SBI1 29
SBT0 27 I/O
SBT1 30
Other
I/O
Function
D0, SEG2 I/O port 8
D1, SEG3
D2, SEG4
D3, SEG5
D4, SEG6
D5, SEG7
D6, SEG8
D7, SEG9
AN0 Input port A
AN1
AN2
AN3
AN4
AN5
AN6
AN7
P00, TXD Serial interface
P03 transmission data
output pins
P01, RXD Serial interface
P04 reception data
input pins
P02 Serial interface
P05 clock I/O pins
3 - 3
Function
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.
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.
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 te 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.
Receive data input pins for serial interfaces 0 to 1.
Pull-up resistors 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.
Clock I/O pins for serial interfaces 0 to 1.
The output configuration, either CMOS push-pull or n-
channel open-drai n can be selected. P ush-pull
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.
Description