Philips ACT-500 Service Manual page 15

PIN DESCRIPTIONS OF IC
MCU MN101C39C_399
Name No.
TM4IO 37 I/O
SDO0 63 Output
SDO1 64
SDO2 65
SDO3 66
SDO4 67
SDO5 68
SDO6 69
SDO7 70
V 24 -
REF+
V 15 -
REF-
AN0 16 Input
AN1 17
AN2 18
AN3 19
AN4 20
AN5 21
AN6 22
AN7 23
IRQ0 38 Input
IRQ1 39
IRQ2 40
IRQ3 41
SENS 39 Input
Other
I / O
F unction
P14 Timer I/O pin
P70, A8, SEG17 Synchronous output
P71, A9, SEG16 pins
P72, A10, SEG15
P73, A11, SEG14
P74, A12, SEG13
P75, A13, SEG12
P76, A14, SEG11
P77, A15, SEG10
+power supply for
- power supply for
PA0 Analog input pins
PA1
PA2
PA3
PA4
PA5
PA6
PA7
P20 External interrupt
P21, SENS input pins
P22
P23
P21, IRQ1 AC zero-cross
detection input pin
3 - 5
F unction
Event counter clock input pin, timer output and PWM
signal output pin for 16-bit timer 4.
To use this pin as event clock input, configure this as
input by the P1DIR register. In the input mode, pull-up
resistors can be selected by the P1PLU register.
For timer output, PWM signal output, select the special
functi on pi n by the port 1 output mode regi ster
(P1OMD), and set to the output mode by the P1DIR
register.
When not used for timer I/O, this can be used as normal
I/O pin.
8-bit synchronous output pins.
Synchronous output for each bit can be selected
individually by the synchronous output control register
(SYSMD ). Set to the output mode by the P1D IR
register.
When not used for synchronous output, these pins can
be used as a normal I/O pins.
Reference power supply pins for the A/D converter.
A/D converter Normally, the values of V
used.
A/D converter
A na lo g i np ut p i ns fo r a n 8 -cha nne l, 1 0 -b i t A /D
converter.
When not used for analog input, these pins can be used
as normal input pins.
External interrupt input pins.
The valid edge for IRQ0 to 3 can be selected through
the IRQnICR register.
IRQ1 is an external interrupt pin that is able to deternine
AC zero crossings. When these are not used for
interrupts, these can be used as normal input pins.
An input pin for an AC zero-cross detection circuit. The
AC zero-cross detection circuit outputs a high level
when the input is at an intermediate level. Otherwise, it
outputs a low level voltage all the times. SENS input
signal is connected to the P21 input circuit and the
IQR1 i nterrupt ci rcui t. When the A C zero-cross
detection circuit is not used, this pin can be used as a
normal P21 input.
The selection is set by the P21IM flag of the FLOAT1
register.
De s cription
=V and V =V
REF+ DD REF- SS
are