Power Input Selection; Reset Control Selection; Pb15 Pull Up/Pull Down Selection; Table 2-12 Power Input Selection - Motorola DSP56824ADM User Manual

DSP56824ADM Technical Summary
Jumper Configuration
Note: The DSP56824ADM is factory configured with PB14 operating as an output to
drive LED2.
2.6.9

Power Input Selection

Jumper group JG14 is used to select the input voltage source to the DSP56824ADM
board. See Table 2-12 for JG14 configuration information.
Configuration
0 (default) 3–4, 5–6, 7–8
1 1–3, 6–8
2.6.10

Reset Control Selection

Jumper group JG15 is used to select the source of the DSP56824's RESET signal. See
Table 2-13 for JG15 configuration information.
Configuration
0 (default)
1
2.6.11

PB15 Pull Up/Pull Down Selection

Jumper group JG10 is used to pull up or down the dual-function signal pin PB15 for DSP
reading at reset. This is required to compensate for nonlinear frequency response in the
clock circuit. For clock frequencies in the range of 32 KHz–2 MHz, JG10 1–2 should be
jumpered to pull down PB15. For clock frequencies in the range of 2 MHz maximum
DSP frequency, remove the jumper to pull up PB15. See Table 2-14 for PB15
configuration information.
2-16

Table 2-12 Power Input Selection

JG14
9–12 VDC from power jack J7 to on-board voltage regulators
User voltage from power jack J7 directly to V
power planes (on-board voltage regulators are bypassed)

Table 2-13 RESET Selection

JG15
1–2 On-board 3.3 V reset logic
NC Reset from external source:
DSP56824ADM User's Manual
Comment
Comment
• Expansion connector J2
• JTAG/OnCE connector J3
and V
CC DD
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