MSC711x Application Development System (MSC711xADS) Reference Manual, Rev. 1
12
Freescale Semiconductor
Hardware Configuration and Boot
2.4.1
Internal Voltage Supply Level (RP1)
The level of internal (core) voltage is tuned via RP1 and is in the range of 0.8–1.5 V. You can measure voltage
across JS5 with a digital voltmeter (DVM) or any other high input impedance voltage measurement device. Core
voltage should be measured and tuned before the MSC711x processor is inserted into its socket.
2.4.2
MSC711x Power-Up Settings (SW4)
The SW4 switches control the configuration for the MSC711x device. These switches are controlled through Board
Control Status Register 2 (BCSR2) (see Chapter 4, Memory Map/Programming Model, on page 29). When a
switch is in the ON position, its related signal is deasserted to 0. When the switch is in the OFF position, its related
signal is asserted to 1.
Figure 2-2. SW4 Factory Default Setting
2.4.3
MSC711x Event Pin Configuration (SW5)
The SW5 switches control the configuration of the MSC711x device and the
EVNT[0–4]
pins. When a switch is in
the ON position, its related signal is deasserted to 0. When the switch is in the OFF position, its related signal is
asserted to 1.
• Switches 1–5 control the
EVNT[0–4]
pin status.
• Switch 6 controls the JTAG mode. For normal operation it must be set to emulator (OCE10) mode.
• Switch 7 controls the polarity of the
HDI
control signals. The state of this switch is sampled only at power-on
reset.
• Switch 8 controls the width of the HDI bus. It must remain in 16-bit mode because the host does not support an
8-bit bus.
Table 2-1. SW4 Switch Settings
Switch
BSCR2 Bit
OFF
ON
1
DBREQ
1
0
2
SWTE
1
0
3
BM1
1
0
4
BM0
1
0
ON
4
3
2
1
1
0
