Pin Description Of Ics - Philips ACT-500 Service Manual

PIN DESCRIPTIONS OF IC
MCU MN101C39C_399
Name No.
V 11
SS
V 8
DD
OSC1 10 Input
OSC2 9 Output
XI 12 Input
XO 13 Output
NRST 32 Input
P00 25 I/O
P01 26
P02 27
P03 28
P04 29
P05 30
P06 31
P10 33 I/O
P11 34
P12 35
P13 36
P14 37
Other
I /O
F unction
Power supply pin
Clock input pin
Clock output pin
Clock input pin
Clock output pin
P27 Reset pin
[Active low]
SBO0, TXD I/O port 0
SBI0, RXD
SBT0
SBO1
SBI1
SBT1
NDK, BUZZER
RMOUT I/O port 1
TM2IO
TM3IO
TM4IO
3 - 1
F unction
Supply 2.0 V to 5.5 V to V
Connect these oscillation pins to ceramic or crystal
oscillators for high-frequency clock operation.
If the clock is an external input, connect it to OSC1 and
leave OSC2 open. The chip will not operate with an
external clock when using either the STOP or SLOW
modes.
Connect these oscillation pins to crystal oscillators for
low-frequency clock operation.
If the clock is an external input, connect it to XI and leave
XO open. The chip will not operate with an external clock
when using the STOP mode. If these pins are not used,
connect XI to V
This pin resets the chip when power is turned on, is
allocated as P27 and contains an internal pull-up
resistor (Typ.35 kW). Setting this pin low initializes the
internal state of the device. Thereafter, setting the input
to high releases the reset. The hardware waits for the
system clock to stabilize, then processes the reset
interrupt. Also, if "0" is written to P27 and the reset is
initiated by software, a low level will be output. The
output has an N-ch open-drain configuration. If a
capacitor is to be inserted between NRST and V
is recommended that a discharge diode be placed
between NRST and V
7-bit CMOS tri-state I/O port.
Each bit can be set individually as either an input or
output by the P0DIR register. A pull-up resistor for each
bit can be selected individually by the P0PLU register.
At reset, the input mode is selected and pull-up resistors
are disabled (high impedance output).
5-bit CMOS tri-state I/O port.
Each bit can be set individually as either an input or
output by the P1DIR register. A pull-up resistor for each
bit can be selected individually by the P1PLU register.
At reset, the input mode is selected and pull-up resistors
are disabled (high impedance output).
Des cription
and 0 V to V
DD
and leave XO open.
SS
.
DD
.
SS
, it
SS