Phytec phyCORE-167CR, Hardware Manual

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phyCORE-167CR/167CS
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PHYTEC Meßtechnik GmbH 2002 L-527e_8
3.5 J6 Oscillator Watchdog / On-Chip Flash
Depending on the type of microcontroller that populates the
phyCORE module, the controller pin 84 has various functions. When
using the C167CR, pin 84 controls the oscillator Watchdog. In
contrast, when a microcontroller with on-chip Flash populates the
module, pin 84 connects the programming voltage. Jumper J6
activates these functions as described in the table below.
The following configurations are possible:
Function of Pin 84 J6
Activates oscillator Watchdog of the C167CR open*
Disables oscillator Watchdog of the C167CR 2 + 3
Connects VPP (12 V) at pin 84 for programming of
the on-chip Flash
Note: This configuration must not be used in
conjunction with an Infineon C167 derivative!
1 + 2
* = Default setting
Table 7: J6 Activating the Oscillator Watchdog
3.6 J7, J8 Use of the External UART
An optional UART can populate the phyCORE-167CR/167CS at U7.
This configuration allows use of a second serial interface. The
controller signal /CS2 activates the external UART. Similar to the
C167CR/C167CS’ on-chip UART, serial communication via the
external UART can be controlled by an interrupt. In this case, the
external interrupt 0 at port P2.8 is used. Jumpers J7 and J8 are used to
connect /CS2 and port P2.8 (EX0IN) to the corresponding pins on the
external UART.