NXP Semiconductors 56F8367, User Manual

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Table 2-2. RS-232 Serial Connector Description
P2
Pin # Signal Pin # Signal
1 Jumper to 6 & 4 6 Jumper to 1 & 4
2 TXD 7 CTS
3 RXD 8 RTS
4 Jumper to 1 & 6 9 NC
5 GND
MC56F8367EVM User Manual, Rev. 2
2-8 Freescale Semiconductor
Preliminary
2.4 Clock Source
The 56F8367EVM uses an 8.00MHz crystal, Y1, connected to its external crystal inputs, EXTAL
and XTAL. To achieve its maximum internal operating frequency, the 56F8367 uses its internal
PLL to multiply the input frequency. An external oscillator source can be connected to the
processor by using the oscillator bypass connectors, JG1 and JG2; see
Figure 2-4 . If the input
frequency is above 8MHz, then the EXTAL input should be jumpered to ground by adding a
jumper between JG1 pins 2 and 3. The input frequency would then be injected on JG2’s pin 2. If
the input frequency is below 4MHz, then the input frequency can be injected on JG1’s pin 2.
MC56F8367
External
Oscillator
Headers
JG1
1
2
3
1
2
EXTAL
XTAL
JG2
8.00MHz
Figure 2-4. Schematic Diagram of the Clock Interface