Motorola MPC564EVB, User Manual

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MPC564EVB User’s Manual 1-21
Connectors and User Components
USE CAUTION when connecting your LCD to the LCD-PORT - make sure the power polarity
(JP2) and correct placement of the LCD cable so that signals are correctly matched.
1.5.3 User Components
The EVB provides a set of user components that maybe applied in user applications or for testing
purposes. The components are interfaced via the J2 Socket Header and are not dedicated to any
particular MPC564 I/O signal. Provided are 4 push button switches (SW1 – 4), 4 LED Indicators
(LED1 – 4), and the user POT (RV1). Following are J2 connections and interface notes:
Table 1-10. J2 User Component I/O
BRK_EN Option
The BRK_EN or Break Enable option is provided to allow an IRQ0 NMI interrupt to occur on SW1
being pressed. This feature is provided to support the Monitor ABORT operation to stop user code
execution and return to the Monitor command prompt. When the option jumper is installed,
depressing SW1 will cause a low active level to be applied to the MPC564 IRQ0.
1.5.4 MPC564EVB Hardware Options
XFC Filter Capacitor C3
Capacitor C3 provides the XFC filtering for the PLL circuits. The capacitor may be changed by
the user if PLL locking problems are experienced at the frequency of operation selected or if the
reference crystal is replaced. Current value is 3.3nF.
J2 PIN COMPONENT NOTES
1 SW1 Active Low, also drives BRK_EN option
2 SW2 Active high, +5V
3 SW3 Active high, +5V
4 SW4 Active high, +5V
5 LED1 Active High
6 LED2 Active High
7 LED3 Active High
8 LED4 Active High
9 RV1 – Center Tap 0 – 5V
10 RV1 +Input or reference +5V, open O4 option to change
11 RV1 –Input or reference Ground, open O5 option to change
12 GROUND Meter or probe ground / common