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1.4.3 Define External Interrupts INT0, INT1
J8 and J24 are used to connect the push buttons INT1 and INT0 to the external
interrupts INT1 and INT0. The push buttons are connected to the external
interrupts INT0 and INT1. Additionally a 10k/10µF RC low pass filter is used for
both interrupt inputs to suppress glitches.
INT0 (J8)
INT1 (J24)
Figure 5: J8, J24, Jumper setting to connect external interrupts (default: J8= 0N,
J24 = ON)
To disconnect the low pass filter and the push buttons, just remove the
corresponding jumper.
1.4.4 Configuration of the RS232 Interfaces
J20 – J23 are used to connnect the two on board serial transceivers to the UART0
and 1 interface of the microcontroller. J20 and J21 are used to connect the
UART0 interface, J22 and J23 are used to connect the UART1 interface. The
jumpers are used to connect the TTL outputs (RXD, TXD) of the serial drivers to
the µC. If the UART interface is not used, the corresponding jumpers should be
left open.
SIN0 (J20)
SOT0 (J21)
Figure 6: J20, J21 jumper setting for the Serial Interface (default: SIN0= 0N,
SOT0 = ON)
Jumper setting
ON (closed)
OFF (open)
ON (closed)
OFF (open)
Jumper setting
ON (closed)
OFF (open)
ON (closed)
OFF (open)
Flash-64P-M01/M09
(J8, J24)
Description
INT0 connected to
push button INT0
No connection
INT1 connected to
push button INT1
No connection
(J20 - J23, S1)
Description
SIN0 connected
No connection
SOT0 connected
No connection
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