Signal/Connection Descriptions
Clock and PLL
MOTOROLA
DSP56367
2-5
2.4
CLOCK AND PLL
GND
A
(4)
Address Bus Ground—GND
A
is an isolated ground for sections of the address bus I/O drivers. This connection
must be tied externally to all other chip ground connections. The user must provide adequate external decoupling
capacitors. There are four GND
A
connections.
GND
D
(4)
Data Bus Ground—GND
D
is an isolated ground for sections of the data bus I/O drivers. This connection must be
tied externally to all other chip ground connections. The user must provide adequate external decoupling capacitors.
There are four GND
D
connections.
GND
C
(2)
Bus Control Ground—GND
C
is an isolated ground for the bus control I/O drivers. This connection must be tied
externally to all other chip ground connections. The user must provide adequate external decoupling capacitors.
There are two GND
C
connections.
GND
H
Host Ground—GND
h
is an isolated ground for the HD08 I/O drivers. This connection must be tied externally to all
other chip ground connections. The user must provide adequate external decoupling capacitors. There is one GND
H
connection.
GND
S
(2)
SHI, ESAI, ESAI_1, DAX and Timer Ground—GND
S
is an isolated ground for the SHI, ESAI, ESAI_1, DAX
and Timer. This connection must be tied externally to all other chip ground connections. The user must provide
adequate external decoupling capacitors. There are two GND
S
connections.
Table 2-4 Clock and PLL Signals
Signal Name
Type
State
during
Reset
Signal Description
EXTAL
Input
Input
External Clock Input—An external clock source must be connected to EXTAL in
order to supply the clock to the internal clock generator and PLL.
PCAP
Input
Input
PLL Capacitor—PCAP is an input connecting an off-chip capacitor to the PLL filter.
Connect one capacitor terminal to PCAP and the other terminal to V
CCP
.
If the PLL is not used, PCAP may be tied to V
CC
, GND, or left floating.
PINIT/NMI
Input
Input
PLL Initial/Nonmaskable Interrupt—During assertion of RESET, the value of
PINIT/NMI is written into the PLL Enable (PEN) bit of the PLL control register,
determining whether the PLL is enabled or disabled. After RESET de assertion and
during normal instruction processing, the PINIT/NMI Schmitt-trigger input is a
negative-edge-triggered nonmaskable interrupt (NMI) request internally synchronized
to internal system clock.
Table 2-3 Grounds
Ground Name
Description
Summary of Contents for DSP56367
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Page 22: ...xxii MOTOROLA List of Figures Figure Number Title Page Number ...
Page 26: ...xxvi MOTOROLA List of Tables Table Number Title Page Number ...
Page 148: ...4 6 DSP56367 MOTOROLA Design Considerations PLL Performance Issues ...
Page 248: ...9 30 DSP56367 MOTOROLA Serial Host Interface SHI Programming Considerations ...
Page 306: ...10 58 DSP56367 MOTOROLA Enhanced Serial Audio Interface ESAI ESAI Initialization Examples ...
Page 389: ...Bootstrap ROM Contents MOTOROLA DSP56367 A 15 end ...
Page 390: ...A 16 DSP56367 MOTOROLA Bootstrap ROM Contents ...
Page 432: ...C 8 DSP56367 MOTOROLA JTAG BSDL ...
Page 484: ...D 52 DSP56367 MOTOROLA Programmer s Reference ...
Page 490: ...E 6 DSP56367 MOTOROLA Power Consumption Benchmark ...
Page 516: ...F 26 DSP56367 MOTOROLA IBIS Model ...
Page 522: ...Index 6 MOTOROLA Index ...
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